cleaning windows... help!!!

I need computer experts and help urgently!!!

My computer was working perfectly fine today until I got a "Windows Updates Installation" message and I clicked "Install"...

Which was okay, until I had to restart the laptop...

And then I got the much-dreaded Blue Screen of Death, and the following message right after starting up:

**Stop: c0000221 {Bad Image Checksum}

The image msvcrt.dll is possibly corrupt. The header checksum does not match the computed checksum.**

STRESS!!!!!!!!

HELP!!!!!!!!

How could I solve this problem myself without resorting to sending the laptop for repairs??

Any help and tips will be much appreciated!!!