I Need help with (possible) adware infection?

Whenever i am working on firefox, some ad-site pops up in an IE browser window, also my PC makes some clicking noises every couple of minutes

what i did:

1. i fully upgraded my avast anti-virus software and superantispyware

2. i completely cleaned my registry using CCleaner, i also deleted temporary internet files, cookies etc.

3. in IE i went to tools-%26gt;popup blocker settings and turned it on,

i also went to IE options-%26gt;privacy and blocked all cookies

4. i restarted and ran a boot-time avast scan, then when it was done, i also scanned with superantispyware

5. despite all this, when i went to pop-up blocker settings, i foun d that by default a couple of things like www.adserver.com and www3.adserver.com etc. are still there in 'allowed sites' list even though i had removed them before i shut-down

its really frustrating me, what to do?

I Need help with (possible) adware infection?antivirus protection

You have done all the right things - now do two free online scans:

http://www.bitdefender.com/scan8/ie.html

http://housecall.trendmicro.com/uk/

This is to check if your scans are missing something.

I Need help with (possible) adware infection?computer repair

To remove spyware/adware,there are many solutions exist, all of them with their own strengths and weaknesses.