Help please - Infection by Sirefef-WL

[MarkBentham]

Hi,

I've run aswMBR and pasted the log below - I then select the FIX option the messages say it's been fixed and reboots , leaving me in the same state , I get exactly the same result after the reboot - Help please , what can I do next ?

11:26:21.807    AVAST engine scan C:\WINDOWS\system32
11:28:28.600    AVAST engine scan C:\WINDOWS\system32\drivers
11:28:35.539    File: C:\WINDOWS\system32\drivers\netbt.sys  **INFECTED** Win32:Sirefef-WL [Rtk]
11:28:41.768    AVAST engine scan C:\Documents and Settings\Administrator
11:31:42.078    AVAST engine scan C:\Documents and Settings\All Users
11:31:51.041    Scan finished successfully
12:05:42.642    Disk 0 MBR has been saved successfully to "C:\Documents and Settings\Administrator\My Documents\MBR.dat"
12:05:42.652    The log file has been saved successfully to "C:\Documents and Settings\Administrator\My Documents\aswMBR.txt"

[jeffce]

Go to this topic http://forum.avast.com/index.php?topic=53253.0 for information on Logs to assist in cleaning malware.
Use the information about getting and using the tools and attach the logs here, not in the LOGS topic.