1, we can turn off hibernation in our own windows7 Ultimate to save the available capacity of system C disk space.

Operation method: Click the start menu, enter "powercfg_hoff" in the search box, and press and hold the Enter key to confirm.

2. Turn off system restore to increase the available capacity of C disk space.

Or through the start menu, click "Control Panel", enter the control panel and click "System". In the system properties window that pops up, switch to the System Protection tab, as shown in the figure.

3. Free disk space through 360.

Open 360 and find the system disk to slim down. This is a clean-up of the whole system disk, and whether the C disk is crowded or not will be detected.

The Win7 system disk cannot extend the volume. Solution:

To expand drive C, the compressed allocated disk marked with green must be adjacent to the right side of drive C, which is equivalent to other volumes that expand drive C. Other uncompressed disk volumes must be together with CP disk, and other disks cannot be separated in the middle. So if you want to expand the volume of drive C, you can delete the whole drive D, then right-click on drive C and select "Expand Volume".