Partmgr.sys is the system file for Partition Manager, a program for assigning drive letters, for deleting partitions, and setting active partitions. It also converts volumes to NTFS or check drives for errors. Drives are each assigned a drive letter, one or more drive paths if mounted on a NTFS drive. Drives without designators are considered unmounted until assigned a drive letter. A drive needs to be unmounted before being moved in another computer. Managing drive paths and letters is done selecting the drive from the Disk Management and right-clicking it and choosing the “Change Driver Letter and Path” option. The partition management software is easily altered, added and merged partitions. Managed partitions are located on the externally connected drives alongside the existing ones within a virtual environment. It can remove and alter the factory-installed partitions, while some software are able to completely clean all data from within the hard drives.

Most non-system processes that are running can be stopped because they are not involved in running your operating system. partmgr.sys. is used by Windows Partition Manager, If you shut down partmgr.sys, it will likely start again at a later time either after you restart your computer or after an application start. To stop partmgr.sys, permanently you need to uninstall the application that runs this process which in this case is Windows Partition Manager, from your system.

After uninstalling applications it is a good idea to scan you Windows registry for any left over traces of applications. Registry Reviver by ReviverSoft is a great tool for doing this.

The ReviverSoft experts have not yet reviewed partmgr.sys

A process usually a part of an installed application such as Windows Partition Manager, or your operating system that is responsible for running in functions of that application. Some application require that they have processes running all the time so they can do things such as check for updates or notify you when you get an instant message. Some poorly written applications have many processes that run that may not be required and take up valuable processing power within your computer.

We have not received any complaint about this process having higher than normal impact on PC performance. If you have had bad experiences with it please let us know in a comment below and we will investigate it further.

The first thing you should do if partmgr.sys. is causing errors on your computer is to run a Windows registry scan with Registry Reviver If you are still seeing errors after this you should uninstall the program that partmgr.sys, belongs to, in this case Windows Partition Manager