Ive got win XP SP 2 on my machine and at first it was really slow, i thought i had a virus, i tried to run my virus software but it was saying that a certain component was missing and i had to reinstall, trying to do this was taking forever, so i booted up in safe mode and reinstalled mcafees, whilst i was in safe mode i deleted some crap from my registry and then rebooted. When i rebooted i had no start bar or icons, eventully a message came up that said "Either there is no default mail client or the current mail client cannot fulfill the messaging request.Please run microsoft outllook and set it as the defualt mail client ", i hit ok to that and the PC just sits there , have my wallpaper but no start bar or icons. I have booted into safe mode but i have the same problem , if i boot into DOS i can see my directories so my hard drive is still as it was. Any ideas on how to fix this, i dont want to reformat as i have alot of important files on my pc that i cannot afford to lose , any help would be greatly appreciated, thanks