Rookit: hidden-boot sector

So I was using my laptop at uni and they blocked me from the internet saying I had a virus. So I installed Avast and did a scan which led to a blue screen.

Rebooted and did a quick scan this time and found Rookit: hidden-boot sector

So I chose to delete it and thought it was solved until I rebooted again and tried to open my web browser. Neither firefox nor IE worked however my torrent does. I did a system restore and got 69 windows update which all failed due to a connection problem it said.

Googled and saw someone saying to use ComboFix but the blue screen always occurs when I try to execute it.

//edit

Used tddskiller and got rid of it. Now I just gotta figure out how to solve my connection problem

Please visit this webpage for a tutorial on downloading and running ComboFix:

http://www.bleepingcomputer.com/combofix/how-to-use-combofix

See the area: Using ComboFix, and when done, post the log back here.