Ive had windows xp pro sp1 recently then i had upgraded it to sp2 via cd-rom.. the installation goes well but then after the last restart the system seemed to slow down in booting up that it would take about 30 min to finish. i viewed the cpu usage at the task manager and it seems not to be the one that i had before. i cant access all the programs for it hangs, some of the device drivers have been missing and i decided to go to the system restore, but then the restore points were cleared..they say its normal after such installation and may take up 3-4 days for some system files to be rebuilt and be stable. is it true?any suggestions to come through.?please.. i really need the help..