20 Best PC Diagnostic Tool List

Aging of a system is as common as human aging. No matter how brand new your PC is, with time it becomes slower. Especially for a Windows PC, it is quite common to encounter problems that are difficult to diagnose. Therefore, keeping an eye on your computer’s health is extremely important. This health checkup helps to bring up-to-date information about your device’s health, prompting you to take action to improve its performance and fix issues. You can fix the performance problems of your system with the help of a PC diagnostic tool. Our today’s guide is all about these tools that you can use for free to keep up with your PC health. To know more about the features, perks, and uses of best PC diagnostic software, keep reading our guide till the end to find a suitable tool for yourself.

20 Best PC Diagnostic Tool List

Best PC Diagnostic Tool List

It is common to run into unknown issues with your PC. Troubleshooting or repairing these issues cannot be done without proper knowledge about the root cause. Getting detailed information about the issue is the first step to attempt. This information can be gathered with the help of PC diagnostic tools that are available as free software on the internet. Let us explore these tools in detail with the help of the list below:

1. System Explorer

 System Explorer | PC diagnostic tool

The first PC diagnostic software free that we are going to uncover in the list is none other than System Explorer. As its name suggests, this software is popularly used to explore system issues and other required information. It helps users easily explore the internal system and processes that run on the computer.


  • System Explorer is a free-to-use software.
  • System Explorer includes many useful tools that help to keep your device under control.
  • It offers fast access to a file database that uncovers unwanted processes and threats.
  • It offers detailed information about processes, tasks, uninstallers, Windows, drivers, services, opened files, connections, modules, startups, and IE add-ons.
  • System Explorer allows easy monitoring of system changes and activities.
  • It also provides tray hints with detailed system and battery status.
  • It helps to easily check suspicious files via the file database or the VirusTotal service.
  • The software also offers the system additional info and a WMI browser.
  • System Explorer offers multilanguage support as well.

2. Speccy


Speccy is another best free PC diagnostic software created by Piriform. This free system information tool is designed to provide all information about a system to its user without being overly cluttered.


  • Speccy is a fast, lightweight, and advanced system information tool for a PC.
  • It helps to quickly summarize the insides of a PC.
  • Speccy offers detailed reporting about a system including stats like CPU, motherboard, RAM, graphics cards, and more.
  • It also helps in providing information about real-time temperatures of critical PC components.
  • This software also allows users to save their scan results as a snapshot, XML, or text file for easy sharing on the web.
  • Speccy works as a regular as well as a portable program.

Also Read: 20 Ways to Make Windows 10 Faster

3. Process Explorer

Process Explorer | PC diagnostic tool

Process Explorer is another PC diagnostic tool that you can use to get information about which handles and DLL processes have opened or loaded. This software is perfect to track DLL version problems or handle leaks.


  • Process Explorer consists of two sub-windows, one is the top window and the other is a bottom window.
  • The top window of the software consists of a list of currently active processes including the names of their own accounts.
  • The bottom window consists of information on the mode of the Process Explorer.
  • In the handle mode of Process Explorer, you will see the handles that the process selected in the top window has opened.
  • In the DLL mode of Process Explorer, you will see the DLLs and memory-mapped files that the process has loaded.
  • One of the main features of Process Explorer is its powerful search capability that quickly shows which processes have particular handles opened or DLLs loaded.
  • The unique capabilities of Process Explorer help users with insight into the way Windows and applications work.

4. Free PC Audit

Free PC Audit

Free PC Audit is a PC diagnostic software free that offers information on the hardware and software of a system. It helps to extract details of all the components of a system, installed software with version, and product key as well.


  • Free PC Audit is a freeware tool that does not require installation and can be used as a portable application.
  • You can run Free PC Audit from a removable storage device such as a USB flash drive, CD-ROM drive, flash card, or floppy disk.
  • Free PC Audit helps in collecting and presenting the maximum amount of information possible about a computer’s hardware and software which makes them suitable for users.
  • The software is compatible with Windows NT up to Windows 11.
  • The software displays information about the Windows product key and ID, a list of installed software, and currently running processes.
  • This software supports making reports.
  • Free PC Audit also lets you copy text from the program.

5. Windows Sysinternals Suite

Windows Sysinternals Suite | PC diagnostic tool

Another best free PC diagnostic software that you can use to check software issues on your PC is Windows Sysinternals Suite. This software is provided by Microsoft for free to diagnose and troubleshoot utilities.


  • Windows Sysinternals Suite is a troubleshooting utility that has been rolled up into a single suite of tools.
  • This software contains individual troubleshooting tools and helps files.
  • Windows Sysinternals Suite does not contain non-troubleshooting tools like the BSOD Screen Saver.
  • It consists of some useful tools for PC including AccessChk, AdRestore, DebugView, Handle, Junction, PsKill, Registry Usage (RU), Streams, VolumeID, Whols, and more.

6. PC Wizard

PC Wizard

PC Wizard is another tool that you can use as best PC diagnostic software. PC Wizard is known to show details on a huge variety of components of a system. It is one of the most informative tools for report detailing.


  • PC Wizard is a tool designed to analyze and benchmark your computer system.
  • With the help of PC Wizard, you can easily copy out single lines of data to the clipboard.
  • PC Wizard consists of basic and advanced information on internal and external hardware.
  • The software also contains useful details on the operating system.
  • PC Wizard can easily be installed on all versions of Windows including Windows 11, 10, 8, 7, Vista, and XP.
  • PC Wizard helps to provide information about CPU and memory subsystems, graphics and video, hard disks, CD/DVD, and removable/FLASH media.

Also Read: How to Fix an Overheating Laptop

7. Reliability Monitor

Reliability Monitor | PC diagnostic tool

A Windows PC also has an in-built PC diagnostic tool that assists users with the identification of software issues. This tool is known as Reliability Monitor and it can be accessed from the Control Panel of your device. You can also simply search for Reliability Monitor from the search bar of your Windows PC.


  • Reliability Monitor is a utility found in Windows Vista, Windows 7, Windows 10, and Windows 11.
  • This tool helps users to view the stability history of their computer.
  • It also helps you to identify previous warnings and past critical and informational events.
  • It helps to track other important events including application crashes or hang, blue screen of death in Windows, software installation time, and new patches loaded by Windows updates.
  • It is an extremely useful tool for computer analysis.



The next PC diagnostic software free that we will be uncovering in the list today is known as HWiNFO. HWiNFO is a free system information tool that provides details for the CPU, motherboard, audio, monitor, network, and other components.


  • HWiNFO is an up-to-date system software that supports the latest technologies and standards.
  • It helps in monitoring all system components for actual status and failure prediction.
  • The interface of HWiNFO is customizable with a variety of options.
  • It offers extensive reporting, status logging, and interfacing with other tools or add-ons.
  • HWiNFO is a trusted and reliable software.
  • HWiNFO is an all-in-one option for hardware analysis and monitoring of a broad range of Windows platforms.

9. Core Temp

Core Temp | PC diagnostic tool

The next best free PC diagnostic software is Core Temp which is a compact, small-footprint, and powerful program that monitors processor temperature and other vital information.


  • Core Temp helps you to monitor the temperature of your CPU (Central Processing Unit) which is the brain of your computer.
  • The software enables you to check the power your system is drawing and general information about the component.
  • Core Temp is capable of displaying the temperature of each individual core of every processor in the system.
  • It helps to display temperature fluctuations in real time with varying workloads.
  • Core Temp also enables a high level of customization and expandability.
  • The software provides a platform for plug-ins that allows developers to add new features and extend its functionality.
  • The operating systems compatible with Core Temp are Microsoft Windows XP, 7, 8, 10, 11, 2003 Server, 2008 Server, 2012 Server, and 2016 Server.

Also Read: How to Lower Your GPU Temp

10. SIW (System Information for Windows)

SIW (System Information for Windows)

Another best PC diagnostic software tool that you can for your system information is SIW. It is an advanced system information tool for Windows that analyzes your PC and gathers details about system properties and settings.


  • SIW helps in offering information about system software, hardware, and network.
  • SIW displays information in a highly compressible manner.
  • SIW is capable of creating an export file (HTML, TXT, JSON, CSV, XML, or ODBC).
  • SIW can be run in batch mode for computer inventory, software assets, hardware, network information, software license management, security audit, and server configuration management.
  • SIW is a portable application that does not require installation.
  • SIW can be run directly from a USB flash drive, a network drive, or a domain login script.
  • The software is updated periodically.
  • Client platforms supported by SIW include Windows 11, Windows 10, Windows 8.1, Windows 8, Windows 7, WinPE, WinRE, and Winternals ERD Commander.

11. Belarc Advisor

Belarc Advisor | PC diagnostic tool

Belarc Advisor is the next name on PC diagnostic tool list. Belarc Advisor is known for displaying basic information on the operating system motherboard, processor, drives, bus adapters, display, group policies, and users.


  • Belarc Advisor gives a detailed profile of the installed software and hardware, missing Microsoft hotfixes, network inventory, security benchmarks, and antivirus status, and displays results on the web browser.
  • Belarc Advisor is meant for personal use only.
  • Operating systems supported by Belarc Advisor include Windows, Apple, Linux, and all Solaris operating systems.
  • This software supports several browsers including Google Chrome, Microsoft Edge, Safari, Firefox, Opera, and others.
  • Using this software requires only a small setup file.
  • Belarc Advisor is popularly known for its unique information which is not provided by other tools.

12. HDDScan


Another PC diagnostic software free that you can install on your device is HDDScan. This freeware software for hard drive diagnostics provides detailed information about the system.


  • HDDScan helps in testing storage devices for errors.
  • This tool helps to show S.M.A.R.T attributes and change some HDD parameters such as AAM, APM, etc.
  • HDDScan supports RAID array servers, flash USB, and SSD drivers.
  • This tool can also be used for performing the regular health test for the drive and predicting its degradation.
  • It allows users to prevent data loss from their system and backup files beforehand.
  • HDDScan can also be used as the hard disk temperature monitor and reading/writing benchmark.
  • This tool reports defect information on SCSI HDD.
  • Reports received from HDDScan can be printed.
  • This tool also offers command line control.
  • HDDScan supports Windows XP SP3, Windows Server 2003, Windows Vista, Windows 7, Windows 8, and Windows 10.
  • HDDScan should not be run from a read-only device/media.

13. ASTRA32

ASTRA32 | PC diagnostic tool

ASTRA32 is another best free PC diagnostic software that is an ideal solution for detailed information about the configuration of your system. ASTRA32 gathers information on several categories including hardware, motherboard, storage, and monitor.


  • ASTRA32 is also loaded with features like drivers troubleshooters and a quick HDD health status checker.
  • Information gathered by ASTRA32 is accurate as it refers directly to the hardware and not to the Windows registry.
  • This tool can also uncover undocumented data.
  • ASTRA32 is known to test hard drive as well for reliability and to work out the diagnosis using a unique algorithm.
  • This program works with hard drives plugged into external UDMA/SATA/RAID controllers.
  • The tool also provides details about all USB and SCSI devices.
  • ASTRA32 offers a built-in report wizard and can work in batch mode.
  • The file formats supported by ASTRA32 include HTML, XML, INI, TXT, and CSV.
  • ASTRA32 is a portable application and can be run without installation.

Also Read: What is Normal CPU Temp while Gaming?

14. CPU-Z


CPU-Z is also one of best PC diagnostic software that you can use in order to gain information on some of the main devices of your system. It is a small freeware utility that is also known as system information software.


  • CPU-Z gathers information on processor name and number, process, package, codename, graphics card, memory frequency, core frequency, and cache levels.
  • CPU-Z also collects information on memory size, type, timings, and module specifications (SPD).
  • CPU-Z helps in real-time measurement of each core’s internal frequency.
  • Mainboard and chipset information is also collected by CPU-Z.
  • CPU-Z detection engine can also be used for customized use.

15. MiTeC System Information X

MiTeC System Information X | PC diagnostic tool

MiTeC System Information X is another PC diagnostic tool that is free to use and helps users to get complex system information about their devices. This tool is based on MiTeC System Information Component Suite.


  • MiTeC System Information X is capable to save the brief text of a full XML report.
  • The tool also helps to store data in structured storage file which is readable by using standard Windows API.
  • The application is completely free for personal as well as business use.
  • It is a portable application that supports copying.
  • MiTeC supports various platforms including Windows 2000, 2003, XP, Vista, Server 2008, 8, 8.1, Server 2012, 10, Server 2016, and Server 2019.

16. CrystalDiskInfo


The next PC diagnostic software free that you can use for Windows drive diagnosis is CrystalDiskInfo. As the name suggests, CrystalDiskInfo provides a complete overview of the state of your system drivers.


  • CrystalDiskInfo is an HDD/SSD utility software that supports a part of USB, Intel RAID, and NVMe.
  • Operating systems supported by CrystalDiskInfo include Windows XP, Vista, 7, 8, 8.1, 10, and 11.
  • Windows Servers supported by CrystalDiskInfo include 2003, 2008, 2012, 2016, 2019, and 2022.
  • The tool helps users give an overview of their data drivers including HDDs, SSDs, and USB drives.
  • Details covered by CrystalDiskInfo include temperature, spin-up time, error rates, uptime, and more.
  • CrystalDiskInfo can also calculate the overall health status of your system.
  • This tool helps users to benchmark their data drives to see how fast they can read and write data.

17. Windows Disk Management

Windows Disk Management | PC diagnostic tool

Windows Disk Management is best free PC diagnostic software that comes in-built into your Windows PC. You can access this utility by right-clicking on the partition you want to scan and then opening its Properties, Tools, and finally the Check option.


  • This tool helps in checking the health of the SSD or HDD and creating new partitions.
  • To perform Windows Disk Management on your PC, administrative privileges are required.
  • This tool helps users to perform advanced storage tasks like initializing a new drive and extending or shrinking volumes.
  • Windows Disk Management is also used to change drive letters and format drives.
  • This utility was introduced as a replacement for the fdisk command.

Also Read: 11 Best Phone Cooling Apps for Android and iOS

18. SIV – System Information Viewer

SIV – System Information Viewer

The next best PC diagnostic software is SIV – System Information Viewer is a general Windows utility used for displaying lots of useful information about your system, its network, and hardware.


  • Information provided by SIV includes PCI, PCMCIA, USB, SPD, ACPI methods, machine info, hardware sensors, networked computers, operating system information, and more.
  • SIV is a useful tool supported by Windows 11, 10, 8.1, 8, 7, Vista, XP, 2022, 2019, 2016, 2012, 2008, 2003, 2000, NT 4.00, and NT 3.51.
  • The SIV tool also comes with a live sensor to show CPU and memory utilization.
  • The user interface of SIV is a bit difficult to follow.

19. ESET SysInspector

ESET SysInspector | PC diagnostic tool

ESET SysInspector is the next PC diagnostic tool that you can use to inspect your PC in detail. With ESET, you can diagnose and fix problems straight away or can even submit a log to ESET customer care for resolution.


  • ESET is a utility that helps users to troubleshoot a wide range of system issues.
  • This free standalone application captures critical and detailed information about your computer.
  • ESET helps to detect the presence of suspicious and unsigned files.
  • It also detects software and hardware incompatibility.
  • You can easily detect outdated or malfunctioning drivers with ESET.
  • Broken registry entries and suspicious network connections can also be detected with ESET.
  • Operating systems required for ESET include Windows 10/8/7/Vista/XP and Windows Server 2012/2008R2/2008/2003.

20. DriverMax

DriverMax | PC diagnostic tool

The last PC diagnostic software free on the list today is none other than DriverMax. DriverMax helps to keep the drivers of your computer up-to-date. This software works by scanning the PC and recommending new drivers to the user.


  • DriverMax is known for automated installs, scheduled scans, and full device driver backups.
  • DriverMax can be set to check for driver updates and download them at any time of the day.
  • DriverMax supports Windows 11, Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista, and Windows XP.
  • DriverMax enables proper and enhanced functioning of internal hardware or devices that are connected to your computer.
  • This tool also optimizes your device by reducing system freezes and malfunctions.
  • This utility analyzes existing drivers and provides the latest versions for over 2,300,000 devices.
  • This intelligent tool makes sure that your system installs only the most appropriate and recent versions.
  • DriverMax also tests each driver before installing it on your PC that ensures its proper functioning.
  • DriverMax also backs up the current drivers and creates a system restore point, allowing a quick rollback of the installation.
  • The latest DriverMax version also notifies and installs updates to various software packages that improve Windows performance including Open AL, DirectX, C++ Runtime, Oracle Java, and more.


This brings us to the end of our guide on the best PC diagnostic tool. We hope that our doc helped you out in your search for the best tool you can use to check your PC health. If you have other queries or any suggestions for us, don’t forget to leave them in the comments section below.

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