Vista - Vista wont boot. Tcpip.sys error URGENT

Hi there,

Well, I tried to fix the network problem when using uTorrent, and read about the tcpip.sys thing. Anyways, it told me to replace it with another tcpip.sys file, and I did, but now it wont start. Nothing works. The error I'm getting is:

File: \windows\System32\Drivers\Tcpip.sys
Status: 0xc0000428

Info: cant confirm the digital signature for this file.
(its actually in norwegian so I dont know what it should be on english operating systems. This is the norwegian error: Info: Kan ikke bekrefte den digitale signaturen for denne filen.)

"luckily" I kept my old tcpip.sys file in the same folder, renames to tcpip-safety.sys, but I cant access it in any way to restore it...

If anyone knows anything, please help me. I have too much information on my computer to format and install windows again.

EDIT: Oh. I'm running Vista Ultimate 64-bit (Norwegian). What exactly does the repair function on the disk? Do I loose any kind of data? Or is it just checking importent files, and copying them if their missing?

eah! It worked.. Sorry for posting here when I figured it out... But I thought it was lost forever :P

Always been afraid of the repair option. I was thinking: windows + repair = loose all your files to start your computer.

Well, not actually loose everything, but I was afraid it would remove something... But in this case it worked perfectly, and I'm happy again ^^