Infected by a sinowal trojan. please help

The other day my PC which is windows xp sp2 apparently got infected. The pc locked up and let out a high pitched sound like a key was pressed in. I have avira premium and did a scan, found sinowal/gen.2 in the internet temp files and at least one dll file. Also HEUR/HTML.Malware. I removed these and deleted the files. Downloaded GMER and did a scan of everything but files, it does not show an MBR infection. Though i am less than confident. The pc often locks up now where i can move the cursor but not close any programs or even click on the start button. I am running IE 8 and have turned on the internet firewall. I have not heard the beepings ound since but programs are still becoming unsreposnive and when I close an IE window it often bleeds into other windows. Any help would be very appreciated

 

I did before all the steps in the guideline...here is the malwarebytes log:
Malwarebytes' Anti-Malware 1.44
Database version: 3907
Windows 5.1.2600 Service Pack 3
Internet Explorer 8.0.6001.18702

3/23/2010 9:43:35 PM
mbam-log-2010-03-23 (21-43-35).txt

Scan type: Full Scan (C:\|)
Objects scanned: 404516
Time elapsed: 1 hour(s), 20 minute(s), 27 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 3

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
C:\ck_1.05.exe (Rogue.Crusader) -> Quarantined and deleted successfully.
C:\Program Files\Paradox Entertainment\Crusader Kings\Crusaders.exe (Rogue.Crusader) -> Quarantined and deleted successfully.
C:\System Volume Information\_restore{D947D7BA-2F2F-4BF1-A0F5-2404BD75DBFE}\RP135\A0040819.exe (Rogue.Crusader) -> Quarantined and deleted successfully.

 

sorry...ok, malwarebyte and combofix uploaded, rootrepeal keeps locking up.freezing even in safe mode. I had my anti virus and firewall off. i did not run the last cleaning tool because rootrepeal has not finished

 

Will do, but for now i have larger issues preventing me from doing this. Windows is not booting as of yesterday. i can get to the recovery console so i think it is a logical failure and not a HD failure. But i want to be able to back up some files still before i delete the partition and do a clean wipe. Should i try fixmbr and fixboot after booting from the windows cd? I would be happy to even get into safe mode to back up the few music albums i purchased last week