What is diagnostics.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the diagnostics.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

Click to Run a Free Scan for diagnostics.exe related errors

Diagnostics.exe file information

Windows Task Manager with diagnostics
Diagnostics.exe process in Windows Task Manager

The process known as SpeedTouch (version 330 diagnostics) or Diagnostics belongs to software SpeedTouch (version 330 diagnostics, 330) or Software Technical Support by THOMSON Telecom Belgium ( or Diagnostics.

Description: Diagnostics.exe is not essential for the Windows OS and causes relatively few problems. Diagnostics.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 557,149 bytes (87% of all occurrences) or 1,727,104 bytes. 
Diagnostics.exe is not a Windows core file. The application starts upon Windows startup (see Registry key: MACHINE\Run, Run). Diagnostics.exe is able to record keyboard and mouse inputs and manipulate other programs. Therefore the technical security rating is 38% dangerous; however you should also read the user reviews.

Uninstalling this variant: If any problems with Software Technical Support or SpeedTouch 330 occur, you may want to safely remove the program using the uninstall program of (Control Panel ⇒ Uninstall a Program) or use the software publisher's support.

Recommended: Identify diagnostics.exe related errors

Important: Some malware camouflages itself as diagnostics.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the diagnostics.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

this is software of adsl modem
  Sally   (further information)
speedtouch 330 driver

Summary: Average user rating of diagnostics.exe: based on 2 votes with 2 user comments. 2 users think diagnostics.exe is essential for Windows or an installed application. One user is not sure about it.

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Best practices for resolving diagnostics issues

A clean and tidy computer is the key requirement for avoiding problems with diagnostics. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the diagnostics.exe process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

diagnostics.exe [all]