Disk Management problem; " The service cannot be started,"

I am trying to shrink a volume on Windows 7 Professional using Disk Management but get the following error:

Virtual Disk Manager

The service cannot be started, either because it is disabled or because it has no enabled devices associated with it.

The disk I am trying to shrink is not the system disk. However as stated by Disk Management it is: Active, Primary Partition.

Solution 1:

I've seen McAfee AV cause a situation where disks cannot be managed. I never figured out why but uninstalling resolved the issue.

I've also seen this issue when the Disk Defragmenter is disabled (for SSD) and turning it on temporarily allowed disk to be managed.

Solution 2:

Open a command prompt as administrator and run:

sc config defragsvc start= demand

enables you to start the defragsvc, beware if you have a schedule in effect.

sc start defragsvc

starts the defrag service so disk management can figure out how to reallocate files when you shrink the volume.

Solution 3:

Go to the start button, type "Services", click it (should have an icon of two gears), scroll down to "Disk Defragmenter". Change the startup type if you want to, and make sure the "Service status" is "Started". If not, make it so.