Remove unknown virus by Combofix

How to remove unknown virus by Combofix:

↣ I believe i have picked up an unknown virus from utorrent. It gave me the following problems:
↣ l was unable to access C: – which i resolved through deleting the autorun.inf
↣ I am no longer able to update AVG – it states that internet connection could not be found – but i am able to surf internet fine. – (not yet resolved)
↣ The windows (xp) firewall keeps turning itself off (not yet resolved)
↣ I cannot start the computer in safe mode – the keyboard disables itself, leaving me with no other choice but to start windows normally.

Tech Advise:1
Step:1
This problem can be resolved by combofix tool.

↣ Please download combofix, because combofix is a spyware and virus remover.
↣ You can download combofix on below links:
http://remove-malware.com/anti-malware-reviews/combofix-latest-version/
http://www.downloads.nl/results/software/1/Combofix
http://www.malwareremovalbot.com/?hop=yanniraz
↣ After download combofix and then
↣ click start >> run >> copy and paste:
↣ cmd /c “%userprofile%\desktop\mbr.exe” -f > check.txt&check.txt
↣ A log will pop out, please post the contents on your next reply.
↣ Please visit this webpage for download links, and instructions for running combofix:
http://www.bleepingcomputer.com/comb…o-use-combofix
↣ Note: Please rename combofix.exe to cfix.exe
↣ Ensure you have disabled all anti virus and anti malware programs so they do not interfere with the running of ComboFix.
↣ Please include the C:\ComboFix.txt in your next reply for further review.

Tech Advise:2
↣ If not work your avg updation, so you can download latest avg update on below link:

Step:2
Please Download latest avg update on below link:
http://free.avg.com/download-update