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. ' \4 @- F& o* J9 y# K$ `4 S9 \! |You know, I mean, you should let the BIOS to recognize the newly installed HDD.2 S* b' ^* }+ a* R9 p4 ` b
PS: against your description, you mayy MEMORY may meet difficulty. unplug them and reinstall after proper cleaning.