HELP. TCPIP.sys problem


Beta member
I was using my computer last night when I got the blue screen of death. When it restarted it came up with a screen that said word for word:

Windows Boot Manager

Windows failed to start. A recent hardware or software change might be the cause. To fix the problem:

1. Insert you Windows installation disc and restart your computer
2. Choose your language settings, and the click "Next
3. Click "repair your computer"

File: \Windows\System32\drivers\tcpup.sys
Status: 0xc0000428
Info: Windows cannot verify the digital signature for this file.

At the bottom it says press enter to continue or esc to exit. My keyboard is non responsive at this point so my only option is to turn off the computer. I entered my Vista installation DVD and it still went to this error screen. I then altered the boot order to boot from DVD first. It says press any key to boot from DVD. When I do this error comes back up. Is there any way to get past this so I can try to either run the repair or replace the tcpip file??