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.& m3 ]) M4 F: @: g7 e& c6 M- o
You know, I mean, you should let the BIOS to recognize the newly installed HDD.: D7 J# W L; M( F" a3 L1 \2 h( X
PS: against your description, you mayy MEMORY may meet difficulty. unplug them and reinstall after proper cleaning.