What is A1Diagnose.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 A1Diagnose.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 A1Diagnose.exe related errors

A1Diagnose.exe file information

Windows Task Manager with A1Diagnose
A1Diagnose.exe process in Windows Task Manager

The process known as A1 Diagnose & Reparatur belongs to software A1 Servicecenter or A1 Diagnose & Reparatur by software engineering and consulting GmbH, web:, mail:

Description: A1Diagnose.exe is not essential for the Windows OS and causes relatively few problems. The A1Diagnose.exe file is located in a subfolder of "C:\Program Files". The file size on Windows 10/8/7/XP is 13,179,660 bytes. 
The program has no visible window. The A1Diagnose.exe file is certified by a trustworthy company. The application starts when Windows starts (see Registry key: MACHINE\Run). The file is not a Windows core file. A1Diagnose.exe is able to connect to the Internet, record keyboard and mouse inputs and monitor applications. Therefore the technical security rating is 55% dangerous.

Uninstalling this variant: The software publisher A1 provides direct support ( and update information ( You could remove the entire program A1 Servicecenter or A1 Diagnose & Reparatur using Windows Control Panel.

Recommended: Identify A1Diagnose.exe related errors

Important: Some malware camouflages itself as A1Diagnose.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the A1Diagnose.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

There are no user opinions yet. Why not be the first to write a short comment?

Do you have additional information? Help other users!
What do you know about A1Diagnose.exe:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving A1Diagnose issues

A clean and tidy computer is the key requirement for avoiding problems with A1Diagnose. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon 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 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the A1Diagnose.exe process on your computer, the following programs have proven to be helpful: ASecurity 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

A1Diagnose.exe [all]