You need to reduce the amount of space currently being used to store system restore points.

What should you do?

A.
Run Disk Cleanup.

B.
Run Msconfig.exe.

C.
Configure disk quotas.

D.
Configure Windows Backup.

Explanation:
Shadow info:
Shadow copies are automatically saved as part of a restore point. If system protection is enabled, Windows 7 automatically creates shadow copies of files that have been modified since the last restore point was created. By default, new restore points are created every seven days or whenever a significant system change (such as a driver or application installation) occurs.

NOT Disk Quota:
Does not directly affect size of System Restore Points.