Need immediate help for my PC!!!?

if altering the RAMs worked before try that again (make sure your hands are discharged before touching the rams, put ur hads on smthn metal before you touch 'em) and if you have two ram sticks remove one and use one only and viceversal . . . it is probably a memory problem. if your ram is not working it wont have space to load the drivers for your input and output devices. . .