In the Win7 system, the compressed volume can only be compressed by half.

Reason analysis:
The software or patch may be installed, and then the system creates a restore point, so the compressed volume function can only compress the latter half. space.
Resolve steps:
1, first turn off the system protection function
2, also close the system protection while also choosing to delete the restore point before deleting, click the "delete" button, and then confirm to exit .

3. After the system protection is turned off and the restore point is deleted, if the C drive is still uncompressible, it is recommended that you back up the system data first, and then perform a one-click recovery system.