press "Delete" when the system starts up to enter BIOS.(The mathod might be various depends on brand of your system, your user manual may help you) Then find a option such as "IDE Detection" or the like. ( w7 ]8 l8 g! t2 UYou know, I mean, you should let the BIOS to recognize the newly installed HDD. " X4 h; v1 g3 p& B p: z3 @9 JPS: against your description, you mayy MEMORY may meet difficulty. unplug them and reinstall after proper cleaning.