helpdeskgeek.com/help-desk/fix-missing-system-restore-points...

If you have no restore points on your Windows Vista or 7 computer, then Windows may not be creating the restore points automatically. There are a number of different problems that can cause this.

One cause is a lack of sufficient free space on ...

support.microsoft.com/en-us/kb/2506576

You set Windows 7 to create System Restore points but notice that your system restore points have been deleted when you restart your computer. You can create new system restore points successfully but those restore points are also being deleted when re ...