out of all of the things you guys said you forgot to mention defragmenting i dunno if it would help at all....i doubt it. ive had this problem before, what are the spec's of your system. i had my computer slow by half just because one of my ram sticks unsettled during the move and when i reseated it it was up to par. by chance have you opened your computer and checked the cables? little things you dont think of can cause big problems is what i learned. thats all the info i have for now.