computer is driving me crazy. just installed new power supply and tried starting computer now im getting error saying floppy disk(s) fail (40) even tho i dont have a floppy disk in my comp.. so i press f1 to continue then another error pops up saying disk boot failure, insert system disk and press enter.. so i put in a copy of windows 7 and press enter and still same error. it wont even let me format and re-install windows... help me pleasssseee ! thanks in advance