Step:1)Remove your computer casing cover.
Step:2)First Extract the all ram which present to your computer.
Step:3)First every ram replace are change and apply again
Step:4)After change the place of all ram now you can extract the processor.
Step:5)After extract its and now you can clean this processor and apply again.
Step:6)After apply now you can close your system casing then open your computer now your computer will on.