I have a problem that my pc is showing blue screen while iam starting to format

Blue screen error can only be one of two things 1 hard drive is is gone or one or more of your memory card are gone if you have more than one memory card take out one and test the machine then change it and test again if the screen is still blue get a card that cames from a machine that works if it still don't work.

try to format the hard drive in other machine if ypu cannot format replace the hard drive