Please run HijackThis and place a checkmark by the following entries:
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O4 - HKLM\..\Run: [Windows smss service] C:\WINDOWS\system32\drivers\etc\service.exe -C:\WINDOWS\SYSTEM32\DRIVERS\etc\smss.exe -b C:\WINDOWS\SYSTEM32\DRIVERS\etc\conf.dll
Close all other windows except HijackThis and press "Fix Checked". Then close HijackThis and restart the computer.
Download Avenger from here:
Swandog46’s Public Tools Page
Open the program. Check the 'Input script manually' option.
Click the Magnifying Glass icon.
In the box that opens, paste this:
Files to delete:
C:\WINDOWS\system32\drivers\etc\service.exe
C:\WINDOWS\SYSTEM32\DRIVERS\etc\smss.exe
C:\WINDOWS\SYSTEM32\DRIVERS\etc\conf.dll
and click 'Done'.
Click the Traffic Light icon to start the program, and OK the prompts to reboot your PC.
Post the Avenger output.txt, which you can find at C:\Avenger\.txt, as well as a new HijackThis log.