What is proquota.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 proquota.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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Proquota.exe file information

Windows Task Manager with proquota
Proquota.exe process in Windows Task Manager

The process known as ProQuota belongs to software Microsoft Windows Operating System by Microsoft (

Description: The original proquota.exe from Microsoft is an important part of Windows, but often causes problems. Proquota.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 50,176 bytes (72% of all occurrences) or 50,688 bytes. 
There is an icon for this program on the taskbar next to the clock. The file is a Windows system file. The program has a visible window. The file is a Microsoft signed file. Therefore the technical security rating is 0% dangerous, however you should also read the user reviews.

Recommended: Identify proquota.exe related errors

Viruses with the same file name

Is proquota.exe a virus? No, it is not. The true proquota.exe file is a safe Microsoft Windows system process, called "ProQuota". However, writers of malware programs, such as viruses, worms, and Trojans deliberately give their processes the same file name to escape detection. Viruses with the same file name are for instance Trojan.Win32.Agent.ahydr or Packed.Win32.Krap.r (detected by Kaspersky), and TSPY_DAURSO.E (detected by TrendMicro).
To ensure that no rogue proquota.exe is running on your PC, click here to run a Free Malware Scan.

How to recognize suspicious variants? If proquota.exe is located in a subfolder of C:\Windows\System32, the security rating is 72% dangerous. The file size is 38,912 bytes. There is no information about the author of the file. The program has no visible window. The file is an unknown file in the Windows folder. The file is not a Windows core file. proquota.exe appears to be a compressed file.

If proquota.exe is located in a subfolder of the user's profile folder, the security rating is 84% dangerous. The file size is 134,144 bytes. The software has no file description. The program has no visible window. The program is loaded during the Windows boot process (see Registry key: RunOnce, User Shell Folders, Run). It is not a Windows system file. Proquota.exe is able to monitor applications.

Important: Some malware disguises itself as proquota.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the proquota.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

quota programme to maximize size of Windows profiles-subdirectory (among others?)
Wenn proquota.exe Eingaben aufzeichnen, Programme überwachen und andere Programme manipulieren kann, wieso wird es als 0% schädlich eingestuft?
Das win-orig hat in der Beschreibung "Prokontingent" zu stehen, meine infiz. Version "Fkuzyxyqer olyjj" (in C:\WINDOWS\system32\wbem). Es gibt eine Sicherungskopie unter "C:\WINDOWS\ServicePackFiles\i386" wird nach löschen aber nicht autom. wiederhergest.
  Noah's Raven  
proquota.exe wird im Netzwerk verwendet um die Profil-Größe der sich anmeldenden User zu überwachen. Wird ein bestimmter Wert überschritten bekommt der User eine Meldung und muss seine Daten woanders Speichern. Sonnst kann das Profil nicht zurück geschrieben werden.
  tut nichts zu sache  
Proquota is used typically in a multiuser domain, where users are given a set amount of profile space. Once this profile space is exceeded (say 30MB), Proquota window pops up with a list of files which it think can be deleted, or are unnecessary. This file list repeatedly lists over and over again showing the sizes, and recalculating the profile space. This allows the user to delete files and see how the profile space usage is reduced. It is harmless, but annoying when the profile space allocated is exceeded, as a popup appears telling you constantly that you have exceeded the space allowed
  Amjad Moghul  

Summary: Average user rating of proquota.exe: based on 3 votes with 5 user comments. One user thinks it's probably harmless. 2 users think it's neither essential nor dangerous. 2 users don't grade proquota.exe ("not sure about it").

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Best practices for resolving proquota issues

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

proquota.exe [all]