Hi, Ice.Maiden.
If you want to try a system restore, it`s very simple, as long as your system restore hasn`t been turned off.
This sometimes happens if you have a virus.
Just click control panel, then help and support on left hand side.
Now click "undo changes to your computer with system restore"
Click next.
If you`ve got some dates in bold, your sytem restore is turned on.
Click one of these dates, go back as far as you can, to when your computer was ok.
If you want to go back to July, click the arrow at the top left of the calendar. Then click next and the restore will start.
If it doesn`t do any good, you can leave it where it is or undo the restore.
I haven`t had to do a restore for quite a while, but it`s really helped me in the past.
Good luck, hope you manage to sort it one way or another.