Blue Screen has turned Black when login in

Hello,
Please Help

Firstly my computer screen was blue and gave me a Error Stop c0000211 bad image check-sum , then I tried most of the advice on line nothing work then I read if I reinstall Xp the problem will go away but then the screen just when Black ....now I have tried for day to fix it done most of the things I read on line but still nothing

Few thing I have done
CTRL+ALT+Del = nothing/no change
Avira Rescue CD = No Virus and nothing / no change
Reinstalled xp = no change
F8 Boot = Nothing /no change
Memtest86= Nothing/no change

Still the screen is black it start off fine the just goes black , im running out of options please help oh in using windows xp on my desktop