What is repair.exe?

The genuine repair.exe file is a software component of Blizzard Repair Utility by Blizzard Entertainment.
"repair.exe" is part of any Blizzard Entertainment software within Windows. The file is used to repair various Blizzard Entertainment games, such as World of Warcraft and StarCraft II. It scans all program files for corrupted data and for missing data, and then repairs the file structure if needed. Accessing/executing the file depends on what software game is in use. Each one has a different method for activating this "repair.exe" file. Blizzard Entertainment software often suffers from data corruption, which is why they incorporated the "repair.exe" file into their software. The company started in 1991 as a game port creator for other software companies. It later evolved into a software company of its own, which led to successful games like World of Warcraft and StarCraft.

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 repair.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.

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Repair.exe file information

The process known as repair.exe belongs to software Uninstaller by Authentium (

Description: Repair.exe is not essential for Windows and will often cause problems. The repair.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 487,424 bytes (25% of all occurrences), 424,960 bytes, 521,512 bytes or 5,242,880 bytes. 
The program has no visible window. The file is not a Windows core file. The software has no file description. Repair.exe is able to manipulate other programs. Therefore the technical security rating is 65% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you run into problems with repair.exe, you can safely remove the program using the uninstall program of ESP (Control Panel ⇒ Uninstall a Program).

Recommended: Identify repair.exe related errors

If repair.exe is located in a subfolder of C:\, the security rating is 68% dangerous. The file size is 5,242,880 bytes. The program has a visible window. There is no information about the author of the file. The process starts when Windows starts (see Registry key: RunOnce). Repair.exe is not a Windows core file. repair.exe appears to be a compressed file.

Important: Some malware camouflages itself as repair.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example Trojan.MSIL.Inject.clni or Backdoor.Win32.Androm.hjct (detected by Kaspersky), and TROJ_GEN.R021C0DG415 or TROJ_GEN.R00XC0DL815 (detected by TrendMicro). Therefore, you should check the repair.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

Used by World of Warcraft to repair (duh) the game.
needed to repair World of Warcraft if you have it installed
Repair.exe is a part of Blizzard Repair Utility created by Blizzard Entertainment, Inc. It is normally found in g:\world of warcraft folder. If found anywhere else, Repair exe could be an indication of a virus, trojan, worm, or spyware. Therefore in such case, there’s a need to scan the computer with an antivirus software to make sure it is not infected.
  Sean   (further information)

Summary: Average user rating of repair.exe: based on 4 votes with 3 user comments. One user thinks repair.exe is essential for Windows or an installed application. 2 users think it's probably harmless. One user suspects danger. One user is not sure about it.

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Best practices for resolving repair issues

A clean and tidy computer is the key requirement for avoiding problems with repair. 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 repair.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

repair.exe [all]