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.9 E1 a$ D; ^5 K# B5 _7 ]
You know, I mean, you should let the BIOS to recognize the newly installed HDD.0 L5 @8 w, o" r% J3 T
PS: against your description, you mayy MEMORY may meet difficulty. unplug them and reinstall after proper cleaning.