Quote: Originally Posted by xxfunguyxx
My question is how does my computer decide which time period I am allowed to restore my pc back to and how do i add time periods? thanks
You can directly control the amount of space devoted to System Restore through its interface accessible via control panel.
The more space you give it, the farther back in time you can go.
I have 7 GB devoted to System Restore. That currently gives me 9 restore points dating back over 3 weeks. If I wanted to be able to restore to 6 months ago, I would have to increase the space devoted to System Restore to perhaps 50 GB---but I've never wanted to go back more than a few days in reality. So 7 GB is plenty for me. Adjust it according to your own needs.
As the space fills up, the oldest restore point is deleted to make room for a new one.