System protection is a feature that regularly creates and saves information about your computer's system files
, and registry settings
as restore points
for all drives that have system protection turned on
. You can use these restore points to do a system restore
to return these items to an earlier point in time without affecting personal files (ex: anything in C:\Users\(user-name) folder). Restore points are created just before significant system events, such as the installation of a program or device driver. They're also created automatically by Windows using a scheduled task once every seven days if no other restore points were created in the previous seven days, but you can create restore points
manually at any time.
To store restore points, you need at least 300 MB
of free space on each disk that is 500 MB or larger. By default, system protection might use between 3-5 percent
of the space on each disk that system protection is turned on for restore points. As the amount of space fills up with restore points, Windows automatically deletes older restore points to make room for new ones. System protection doesn't run on disks smaller than 1 GB
This same setting also determines the maximum disk space that can be used to store system images
on a drive letter. The size of a system image can be quite large since it will include all system drives in the image by default plus any drives you have included. If you want to keep multiple system images, be sure to increase the max size accordingly.
This tutorial will show you how to manage and change the maximum disk space
you want to be used for system protection
restore points and system images
in Windows 8
System Restore isn't available for Windows RT
You must be logged in as an administrator
to be able to change the maximum disk space used for system protection and system images in Windows 8.