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. : j$ \7 |9 L' [! \2 ~7 H6 g; LYou know, I mean, you should let the BIOS to recognize the newly installed HDD. & E/ ^' u; T& G" s |& C) J# lPS: against your description, you mayy MEMORY may meet difficulty. unplug them and reinstall after proper cleaning.