Tip: If your volume is not a System one you may wish to skip the initial steps (before Restart) The first time I tried to resize it the minimum size was around 425GB. I used this method to successfully shrink a System volume (C:) on Windows Server 2012R2 from 500GB (with only 50GB of actual data) to 80GB. The interesting fact which often goes unsaid is that after a partition shrink the minimum size is also reduced (of course, if you have free space, defragged, no unmovable files, etc). I have later found similar instructions at other places, all of them mentioning only these 3 items. If Disk Management complains that “There is not enough space available on the disk(s) to complete this operation.” even though you entered a size that should work according to Disk Management's own figures, see Cannot shrink C: partition: Not enough space Reduce partition size, and then restore the three items. Now the three files that were preventing partition reduction are gone. In the “System Properties” dialog as above, go to the “System Protection” tab, click “Configure.” and select “Disable system protection”. Click “Advanced System Settings”, then in the “System Properties” dialog's “Advanced” tab, open the “Performance” settings, go to the “Advanced” tab, click “Change.” under “Virtual memory”, untick “Automatically manage paging file size for all drives”, select the drive you want to shrink, select “No paging file” and click the “Set” button. Open the System page in Control Panel (from “This PC”/“My computer”, open the Properties).
Running under Windows 10, but I doubt it makes a difference here.Īt a an elevated (admin) command prompt, run the command powercfg /h off
I have followed the instructions here, and I successfully shrank my OS partition in about 10 minutes. There seems to be absolutely no need for any third party software.
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