Here is a completely different method to the one above, if the one mentioned above doesnt work, try this:
http://www.technibble.com/how-to-remove-the-aboutblank-hijacker/

Do the popups look like this?

http://www.technibble.com/articlecontent/casestudy-virus/virus2.gif


If so, click on the bubble and it will take you to a site.

If the site is Antispylab.com:...

Some good instructions here if all the previous ones have failed:
http://www.technibble.com/how-to-remove-spyfalcon/

Hope it helps.

I suspect this could be one of two things.

Either a damaged keyboard F1 key.. or a virus infection.
People would say that it shouldnt happen after formatting. Perhaps you are installing a pre...

Can you show us a screenshot of it?

I am pretty sure this is Spyfalcon, does the popup look like this:
http://www.technibble.com/articlecontent/casestudy-virus/virus2.gif



If so, this is where you can find Spyfalcon removal...

If any of the above dont work, give this a shot:
http://www.technibble.com/how-to-remove-spyfalcon/

Remove these lines:

D:\WINDOWS\system32\devldr32.exe
O2 - BHO: Nothing - {f79fd28e-36ee-4989-aa61-9dd8e30a82fa} - D:\WINDOWS\system32\hpBE27.tmp
O4 - HKLM\..\Run: [c750348f.exe]...

Some decent Anti Spy Lab removal instructions can be found here:
http://www.technibble.com/how-to-remove-antispylab-spyware-sheriff/

Hope it helps

Another good removal instructions for AntiSpyLab can be found Here:
http://www.technibble.com/how-to-remove-antispylab-spyware-sheriff/