Need Assistance Virus? Avast shuts down

I downloaded Advast free because I believe my husband has a virus on this (his) computer. It all started with his text and desktop all missaligned. Then very slow computer, so I installed Advast and scanned. Attachment shows a screenshot of the log. It would not repair or do anything. I rescanned and before scan completed the computer rebooted and showed no virus yet the computer is very slow still. I have no idea on what to do.

Can someone help?

sorry he is running XP

Hi there lets have a quick shufti

Download OTL to your Desktop
Secondary link

[*]Double click on the icon to run it. Make sure all other windows are closed and to let it run uninterrupted.

https://dl.dropbox.com/u/73555776/OTL_Main_Tutorial.gif

[*]Select All Users
[*]Under the Custom Scan box paste this in

netsvcs
BASESERVICES
%SYSTEMDRIVE%*.exe
/md5start
services.*
explorer.exe
winlogon.exe
Userinit.exe
svchost.exe
winsock.*
/md5stop
CREATERESTOREPOINT

[*]Click the Run Scan button. Do not change any settings unless otherwise told to do so. The scan wont take long.
[*]When the scan completes, it will open two notepad windows. OTL.Txt and Extras.Txt. These are saved in the same location as OTL.
[*]Attach both logs