For the system restore problem, go to control panel and open System. you will a system restore tab, click on the tab and tick the box to turn off system restore. This will delete any restore points there are, then re-boot. once re-booted turn on system restore and see if you can make a restore point. For the other issue try running sfc, do this by clicking start then run, in the run box type, sfc /scannow, must have a space after sfc. Have your XP disc ready as you will probably need it. Hope this helps.