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As you can see from the title, im not able to shrink my C drive NTFS partition (My Windows 11) partition.

[1]: https://i.sstatic.net/flz4j.png

Here are something i tried to solve it:

  1. Disable hibernation through powercfg/h off
  2. Disable virtual memory and set to no paging file
  3. Disable system protection
  4. Defragment the disk with Defragment and Optimize Disk
  5. After defrag, i checked the event viewer log and filter defrag. The first event(latest) shown successful.

After all of them i restarted my pc

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    What does it say in the log?
    – DavidPostill
    Mar 17 at 8:07
  • A third-party defragmenter might do better, especially one that can run at boot. See this random link. Take backups.
    – harrymc
    Mar 17 at 9:39
  • You need to defrag it on another pc or using live usb booted OS, or similar. You wont be able to "move" file(s) to another sector if(and they are) its used by system. After defragment is done, reset and enter your OS as usual, and try to resize partition(you can try resize on live OS, but not advisable).
    – Danijel
    Mar 17 at 10:26

1 Answer 1

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  1. Create a Windows install USB stick (any Win10/Win11 version will work).
  2. Boot from the USB stick.
  3. At the "Welcome to Windows Setup" screen, press Shift-F10.
  4. In the "Command Prompt" window, run diskpart.
  5. In Diskpart, run list disk to find your disk and sel disk XXX to select it.
  6. Run list part to find your C:\ partition and sel part XXX to select it.
  7. Run shrink querymax to check how much the volume can be shrunk.
  8. Run shrink desired=MMM minimum=MMM to shrink it by the specified number of megabytes.
  9. Exit Diskpart, run wpeutil reboot, remove USB stick.

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