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. & ^5 @) C( q# r+ }You know, I mean, you should let the BIOS to recognize the newly installed HDD. % F9 r; D7 F' P8 a4 [- `PS: against your description, you mayy MEMORY may meet difficulty. unplug them and reinstall after proper cleaning.