System Restore uses a considerable amount of disk space on the computer. While it’s not a problem for systems with bigger hard drives, you most likely would be running out of disk space in systems with a low-capacity drive such as a 150 GB hard disk, especially if you have Windows 10.
If you’re running short of disk space, you can analyze disk usage by files and programs, clear previous Windows installation files, and wipe out temporary & junk files using Disk Cleanup or CCleaner. In addition, you can lower the disk space allotted to System Restore to free up disk space in any version of Windows.
Windows Vista included some hidden (a.k.a 