- I upgraded from Windows 7/8 to Windows 10 and cannot increase the size of my virtual machine disk.
- After I increased the hard disk space by following KB 113972, the Windows disk size still remains the same as it was before increasing it in File Explorer.
- If I open Disk Management ( Start button > type diskmgmt.msc > hit Enter (Return) ), I see that the last partition on the disk has been increased instead of the C:\ partition:
Parallels Desktop increases the space of the last partition in a list. This is a default Windows behavior. To increase the size of a desired partition, you should use the Diskpart program.
NOTE: Before proceeding with the instructions below we highly recommend you creating a snapshot for data safety purposes.
To add space to the C:\ partition you need to remove the last partition that was extended by Parallels Desktop:
Right-click Start button, then click Command Prompt (Admin).
Click Start button and type Command Prompt then right-click on the suggested item Command Prompt > select Run as administrator.
Open the DISKPART utility by executing the following command:
Navigate to the required disk:
list disk select disk <#>
where <#> is the required disk number:
Navigate to required partition and remove it:
list partition select partition <#> delete partition override
where <#> is the number of the Recovery partition:
Navigate to the required volume and extend it:
list volume select volume <#> extend
where <#> is the C:\ volume number.
When the operation is finished, the following message will be displayed: DiskPart successfully extended the volume.
- To make sure the operation was completed successfully, open File Explorer in your Windows virtual machine and check the size of the C: partition.