Okay, I downloaded the HITMAN and ran it... It appears a lot of many ads etc.. infecting my pc, one of which showed the WINLOGON.EXE being infected...
At the end of the scan, it asked for reboot to disinfect.... After reboot, my desktop appeared, and did a re-scan, at which the WINLOGON.EXE appeared infected, again...
Re-ran HITMAN and reboot... Desktop now is gone, using task manager, i ran HITMAN once more and WINLOGON.EXE appeared infected.. Reboot....Re-scan and the WINLOGON.EXE is not anymore showing... however, my desktop is still not appearing.
Using task manager, I ran COMBOFIX, and the WINLOGON.EXE "did not" appear, however, the EXPLORER.EXE appeared as infected, CF successfully repaired and reboot.
After reboot, the desktop appeared and waited for the log.txt to come up. Did a re-scan with HITMAN and nothing appeared anymore being infected...
Re-ran AVAST and nothing appeared infected...
Wow, so it was a combination of both... So, thanks to all your posts guys, hopefully my problem is solved and will install additional anti-malware as you suggested.
I got infected when visiting a site, and my Avast protection was disabled..
More power to you guys....