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. / N) [4 p2 l" fYou know, I mean, you should let the BIOS to recognize the newly installed HDD. ; |, R& ~& ]* b9 TPS: against your description, you mayy MEMORY may meet difficulty. unplug them and reinstall after proper cleaning.