I have the exact same 4 registry keys that won't delete with Malwarebytes ... plus one extra HKLM BHO key ...
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\bf HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\bk
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\iu HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\mu
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\ .....

I tried using avenger2 (input delete registry text file) with no luck ...
and tried dragging a "killall:: ... infected reg keys"" text file onto Combofix .... still no luck

I haven't gotten any popups since I deleted files (c:\windows\system32\~.exe and c:\windows\system32\comcatk.dll) from a dos prompt off an xp recovery cd ... the comcatk.dll file was referenced from the BHO per hijackthis (didn't have any luck deleting these files in more traditional ways)

any ideas would be appreciated ...

Let us see an MBAM and HJT log please. We're working in the dark here.

Update and Scan with Malwarebytes' Anti-Malware

• Start MalwareBytes AntiMalware (Vista users must Right click and choose RunAs Admin)
• Please DO NOT run MBAM in Safe Mode unless requested to, you MUST run it in normal Windows mode.
  
  • Update Malwarebytes' Anti-Malware
  • Select the Update tab
  • Click Update
• When the update is complete, select the Scanner tab
• Select Perform quick scan, then click Scan.
• When the scan is complete, click OK, then Show Results to view the results.
• Be sure that everything is checked, and click Remove Selected.
• When completed, a log will open in Notepad. please copy and paste the log into your next reply
  • If you accidently close it, the log file is saved here and will be named like this:
  • C:\Documents and Settings\Username\Application Data\Malwarebytes\Malwarebytes' Anti-Malware\Logs\mbam-log-date (time).txt

Then RESTART the computer

AFTER the reboot run HJT Do a system scan and save a logfile
The post back NEW MBAM and HJT logs in that order please.

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