10 Best Computer Diagnostics Software for Technician Repair

Computers are an essential part of our daily life. They are almost everywhere. In every house and workplace, we are surrounded by computers.  They surely ease our daily work. This is the reason when your computer gets into some problem; you found yourself crippled. Then you call the troubleshooting guy for the repair work.

The job of computer technicians is not easy. They have to check every single part of your machine to diagnose the problem. This task consumes a lot of time and energy, believe me. Here in this article, I am listing ten computer diagnostics software that could help technicians in this task. These tools don’t fix the problem, but they help to know where is the problem.

1. CPU-Z

CPU-Z is a compact and free tool that allows you to analyze different part of the machine. This tool helps you to know which part is causing incompatibility issue. If you have recently upgraded the PC parts, then CPU-Z will help you to know which part is causing the problem.

CPU-Z - 10 Best Computer Diagnostic Software

CPU-Z gathers information from several main devices in your computer. It displays the processor name and number, process, codename, cache levels, and package. It also shows information from mainboard and chipset. Information about memory and processor core’s frequency is also available there.

2. Performance Monitor

Windows 10 has its diagnostic tool. You can launch it by searching in the start with the name of Performance Monitor. You can also run the perfmon command to begin it.

Performance Monitor - Troubleshooting Software

This tool displays information about memory, network, disk, and processor. You can also access Data Collector Sets and Reports in here. You can add counters to check paging file size, disk usage, energy used, index size, etc.

3. Process Explorer

Process Explorer is a lightweight utility from Microsoft. Its size is just 1.7 MB, and you can get it for free. Process Explorer is useful in checking which DLLs and handles are running. It shows information on active processes on the top window. It also displays which account own them.

Process Explorer - Best Computer Diagnostic Tools

You can select a process to check which handles it has opened. You can also switch to DLL mode to know opened DLLs and memory-mapped files that particular process has loaded. Process Explorer is useful in tracking down DLL version problem and handle leaks. It also lets you know how Windows and application work.

4. Angry IP Scanner

Angry IP Scanner is a free and open source tool. It scans your network to check which devices are using which IP address and ports. This tool is helpful in case you want to know if someone is misusing your network. It lists all the IP Addresses, hostnames, Mac Addresses, and ports.

Angry IP Scanner - 10 Best Computer Diagnostic Software

Angry IP Scanner also checks for NetBIOS information like computer name, workgroup name, and currently logged-in user. You can also export all this information to multiple files like CSV, TXT, XML, or IP-Port list files. The advanced users can write Java code to extend its functionality.


HWiNFO is a great tool to check the status of the hardware configuration in your PC. It is a free tool and also comes in a portable version. HWiNFO provides in-depth information on all hardware components. It also provides Real-Time system monitoring. It reports back if a particular system component stops working.

HWiNFO - Best Computer Troubleshooting Tools

HWiNFO also provides several types of reports, status logging, and interfacing with other tools or add-ons. There are lots of tables and graphs options that make it more useful. Don’t take this tool lightly, NASA uses it to monitor their computer failures in high radiation fields.

6. CrystalDiskInfo

CrystalDiskInfo is a great tool to check the health of your hard drive. It displays the status of standard hard drives and SSDs. It shows the information about firmware, buffer size, Power on time, etc. CrystalDiskInfo also displays the temperature of your hard drive.

CrystalDiskInfo - Best Tools to Diagnose Computer Problems

It displays S.M.A.R.T. information and AAM/APM Control. You can also check the graphs to understand the statics. CrystalDiskInfo also alerts you on your email and the system about any health dangers to the hard drive.

7. Resource Monitor

Resource Monitor is a Windows inbuilt utility. You can access it from Task Manager or the start menu by searching. If you are not getting detailed information from the task manager, then you can use it. It shows comprehensive information on CPU, Memory, Disk, and Network.

Windows Resource Monitor

It lists the processes and their PID with their usage. This tool is helpful if you want to know which is process is causing memory issue. You can also tell which process is consuming your whole bandwidth.

8. Speccy

Speccy is a free tool from Piriform. There is also a paid version that has automatic updates and premium support option. Speccy provides detailed information on every part of your computer hardware. It is an excellent tool to diagnose CPU, Motherboard, RAM, Graphics Card, Hard Drive, and other device.

Speccy - 10 Best Computer Diagnostic Tools for Technicians

It also displays real-time temperatures of your critical hardware. You can prevent damages due to a high temperature to CPU, RAM, and Hard Drive.

9. Windows Sysinternals Suite

Microsoft has collected all its troubleshooting tools into one suite. It has around 75 different tools, and they are all free to use. It has the collection of tools that you can use to diagnose problems in different part of the computer.

Windows Sysinternals Suite

Sysinternals suite has tools to diagnose problems with CPU and process. It also has tools to check memory and disk problems. You can also troubleshoot network issues with this suite.

10. WinDirStat

WinDirStat is a great tool if you are going to check your hard drive usage. Its full form is Windows Directory Statistics. It displays the folders and files in the tree-based hierarchy. There is also a graph that tells how the data is saved in the hard disk.

WinDirStat - Tools to Diagnose Computer Problems

This tool is helpful if you are going to clear additional storage from the hard drive. The computer technician can use it to save time if they are making space on their client’s computer. It takes a little bit of time analyzing the drive, and that depends on the files and folders in that drive.

10+1. MalwareFox

I include one bonus tool that could save you from lots of problems. Nowadays malware is everywhere. They do not just affect the software and data in the computer but also can damage the hardware. Malware could increase the hard drive or processor usage to an extent where PC could crash or merely dead.

MalwareFox Premium - Top 5 Antimalware Software in 2019

MalwareFox is a lightweight antimalware capable of catching such culprits. It quickly scans the computer and removes several threats like spyware, ransomware, trojans, rootkits, and many others.


These are the best diagnostic tools that could save a lot of time for computer technicians. Most of these tools are free to use, and some are paid. However, you can recover the money by increasing the efficiency in your work. You sure don’t need all these tools, but you can choose by reading the description. I might have missed some great tools in this list. So, comment down your best mate during troubleshooting computers.

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