Dullard, your popups have a border thats says something like "ABI - Aurora" at the top, yes? ABI = A Better Internet (Ha! That's funny!)... ABI/Aurora/WinFixer are all the same spyware. This spyware is like a hydra... WinFixer is only 1 head of the beast.
I saw an article on the front page of the New York Times last month about people throwing PC's away, because their machines were so corrupted with spyware. Why call Geeks-on-Call or Best Buy and pay $250-$300 for a spyware sweep, when you can get a whole new system from Dell or HP for the same price? The sad part was the author's solution to prevent spyware infection was that you avoid file sharing and other nefarious websites.... how three years ago! The marketing companies are PAYING money to the former virus and script kiddie authors to write perfectly legal spyware that is covert and not detectable by normal means.
I tell my customers that spyware is a lot like obscenity... it's hard to define, but you know it when you see it.
If you're running a computer connected to the internet without any anti-spyware running, you're going to get infected in a very short period of time (minutes). Unlike anti-virus measures, more anti-spyware is better.
It's not a matter of which websites you visit... it doesn't matter that you have Symantec's latest anti-virus loaded (though they have been saying for 2 years that they "protect" you against spyware... BS).
From your original post you say you loaded Ad-Aware and Spybot AFTER experiencing trouble...
Before I connect any computer to the 'net, I install a suite of anti-spyware programs. I suggest you do the same.
*edit*
The problem with WinFixer in your case is that even though you NOW have anti-spyware enabled and cleaned your system, it has a registry entry that will execute a file called nail.exe. Nail then covertly reloads WinFixer onto your machine. I've sent updates to Microsoft and a couple other anti-spyware developers regarding this. Hopefully their future detection updates will be able to detect the registry corruption...
Follow the section Uninstall 2 on this page to disable Nail.exe...
Cliff Notes on the process:
1) Run regedit and remove the reference to nail.exe
2) Open Nail.exe in Wordpad and delete the entire contents... make it a blank executable. = No payload
3) Run Spybot, Ad-Aware, and MS ASB to clean up any other references to Aurora/ABI.
4) Use either msconfig or the System Startup tool in Spybot to ensure that WinFixer isn't still included as a startup program.
5) Reboot your machine.
PS... what's really sad is that these marketing companies are now suing companies like Lavasoft and Microsoft... contending that their actions are perfectly legal, and that "they shouldn't be included" in the anti-spyware definitions. There ought to be a law...