There's a chance that you may have gotten infected after removing your two antivirus programs and going to the Web for Comodo. The other possibility is that you uninstalled Norton, if you had it, without using the
Norton Removal Tool. You shouldn't play with the registry as you may delele important files by mistake.
Can you post a HijackThis log?
Please click here to download and install the HijackThis installer. Run it and select Do a system scan and save a logfile. The log will be saved in Notepad. Copy and paste the log in your next post. Do not fix anything