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. - L a) o" F' j3 ]2 `5 O8 b5 ]3 O. HYou know, I mean, you should let the BIOS to recognize the newly installed HDD. 3 W% b4 {; d# i2 a6 S6 [PS: against your description, you mayy MEMORY may meet difficulty. unplug them and reinstall after proper cleaning.