~ When boot go into the options where there is ' Safe mode' and etc etc
~ Choose " Command Prompt Only"
~ When it goes to the black screen( ? ) and the cursor is flashing type
~ Press " Enter"
~ Wait for a while, deppending how long it will take and you will see it go through options scanning ya reg'
~ Then it will say registry repairded
~ Press "Enter"
~ Then CTRL + ALT + DELETE to reboot
Dunno if its the way you want to do it, or that it would work for you *shurg*
Plus you prob knew how to do that anyways ^^ up there..