Forum Discussion
Can't extend or shrink my C: Drive
I tried shrinking my C: drive in Disk Management, but it only lets me shrink it by 282 MB despite having more than 165 GB of free space.
Most likely caused by - Unmovable file near end of C:
Try these steps:
Disable hibernation.
Open an elevated command prompt: powercfg -h off
Then temporarily disable the page file:
System Properties
→ Advanced
→ Performance
→ Advanced
→ Virtual Memory
Then Defrag once: defrag c: /x
Reboot and check shrink space again.
Sometimes you'll suddenly get 100+ GB available.
If this fails, try Hiren bootCD (USB version)