For yyy65.html and other yyy-type popups, you can use the l2mfix program found at these locations:
Download the zip file and unzip it to your desktop. This will create an l2mfix folder.
From within the folder run the l2mfix.bat file.
Select option #1 for Run Find Log.
Select option #2 for Run Fix. It will reboot your computer and then run the fix on reboot. On some systems the scanning passes may take a while so be patient.
After it is done it will open up notepad with a trace log.
I usually run ewido and a virus checker like AVG after that, just for good measure.