ATAPI.SYS Rootkit

Hi all,
I have a wee problem.
Firstly the problem is on a netbook.
I was browsing the web with Chrome, and my firewall notified on allowing java access, and without thinking I allowed.
So then Chrome starting lagging and wouldn't load anything. So I tried IE and it worked but my firewall said I was blocked from being redirected.
So after looking around, doing scans etc. I found info on atapi.sys file and it had been modified on the date of the infection. So I tried deleting it and replacing it with a copy I have on my PC, the reason I have a copy on my PC is because I installed XP on the netbook with a pendrive.
I should of known better Now I'm getting blue screen telling me windows has been shut down to prevent damage to your computer.
I have put the copy of XP back on the pendrive and tried booting from it but no joy.
I would prefer not to have to re-install windows, any help would be much appreciated.

Wow, no replies. Well I've got an update, I've managed to install windows on the other partition of my hard drive so I can now access the C partition where the virus is Happy days!
So, My new question is how can I scan for it from the other non infected partition?
Thanks....assuming someone actually answers

Edited by Budapest, 04 May 2010 - 05:03 PM.
Moved from Virus, Trojan, Spyware, and Malware Removal Logs ~BP

well thanks for moving my post! don't worry about replying I can probably fix it on my own!