What does the pop-up window say? It obviously shouldn't be there, and it could certainly indicate that you've got malicious programs on your system. Remember that no single utility, included Ad Aware, will be able to detect and remove all possible infections.
In your Internet Options control panel under Temporary Internet files->Settings, what is the "check for newer versions of stored pages..." option set to?
DMR
Wombat At Large
7,229 posts since Dec 2003
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Should I try another spyware detecting program?
Yes, but I don't have time to respond in detail right now (dinner time on my end of the world).
I'm moving this thread to our Security forum so that our "spyware" experts can offer their input. Have a look through the threads in the security forum to find out what other programs you can use to help rid yourself of your "unwanted guests".
DMR
Wombat At Large
7,229 posts since Dec 2003
Reputation Points: 221
Solved Threads: 370