What is partmgr?

Partmgr.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if partmgr.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for partmgr drivers in need of updating

Partmgr.sys file information

The process known as Partition Management Driver or Partition Manager belongs to software Microsoft Windows Operating System by Microsoft (

Description: The original partmgr.sys is an important part of Windows and rarely causes problems. Partmgr.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 19,712 bytes (40% of all occurrences), 18,688 bytes and 4 more variants. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. The file is a trustworthy file from Microsoft. There is no detailed description of this service. The partmgr.sys file is a Windows core system file. partmgr.sys appears to be a compressed file. Therefore the technical security rating is 2% dangerous; however you should also read the user reviews.

Uninstalling this variant: It is possible to visit the website or uninstall Microsoft Windows Vista or Microsoft Windows from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify partmgr.sys related errors

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

Formatierung :c abgebrochen. Gestoppt bei partmgr.sys. Unter win98 fdisk Partitionen gelöscht. UnterXP neu partitioniert, bei Formatierung Abbruch mit gleicher Meldung. Platte eigentlich komplett leer???
  Burghard Wunderlich  
I had the same problem its the hardrive. It is caused due to the hardrive boot sector.
Used to determine system disk drives
Wenn die Fehlermeldung nach dem Neuinstallieren von Windows XP auftritt ist das Anti-Virenprogramm (nicht von Microsoft) noch aktiv gewesen. Windows XP kommt bei der Neuinstallation mit fremden Anti-Virusprogrammen in konflikt und gibt diese Fehlermeldung raus. Deshalb empfehle ich vor der Neuinstallation von Windows XP auf jeden Fall das Anti-Virusprogramm zu deaktivieren oder zu deinstallieren. Sollte diese Fehlermeldung nach einem Neustart mit vorangegangenem Betriebsfehler (Abstuz, Hängter etc) gekommen sein, dann ist mit großer Warscheinlichkeit die Festplatte defekt.
  praktisch denkender  

Rating chart

Summary: Average user rating of partmgr.sys: based on 8 votes with 4 user comments. 5 users think partmgr.sys is essential for Windows or an installed application. One user thinks it's probably harmless. One user thinks it's neither essential nor dangerous. One user thinks partmgr.sys is dangerous and recommends removing it. One user is not sure about it.

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Best practices for resolving partmgr issues

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

partmgr.sys [all]