System+Restore+Points+deleted+when+you+restart+Windows.

If you find that your System Restore Points have been deleted when you restarted Windows 7, this can be caused by the maximum storage size limit being set too low for your shadow storage.

 To fix the problem, you will need to change the setting for the maximum shadow storage allocation.

You will find a step by step guide to doing this in __ [|KB article 2506576] __. []