System Restore Points are a nice feature of Windows which lets you revert your system to a previously saved state. However, system restore points take up a lot of space and most of the times we need only our last system restore point. So why not remove the previous ones?
Open the Start menu and in the search box, enter cleanmgr and press Enter:
Select a drive:
Press OK. Disk Cleanup will scan your drive for file you may not need:
A new window will open:
Press the Clean up system files button. Again you will be asked to select a drive. Select the drive on which your Windows is installed:
Disk cleanup will scan again and reopen. Select the More Options tab:
In the System Restore and Shadow Copies panel press the Clean up button. You will be prompted to confirm the action:
Press Delete to delete all, but the last System Restore Point.