I am unable to change my desktop background.
At the top of any visited website, in red across a pink background, it says, "18 Trojans WERE found on your machine! !!!!Warning! Your system is at risk! !!!Free Virus Scan!!!!" Moving the cursor over the link indicates it will go to http://real-av.org/cgi-bin/download.pl?code==7.
When I attempt to initialize a scan with my own antivirus software, Symantec, it freezes up and ceases to respond. When I try to download/run new antivirus or antispyware software (such as Spybot), I receive an error message. For example, I am able to download mbam-setup.exe without problems. However, when I double click to install it, I am told, "Invalid floating point operation." This message appears a few times, followed by, "Exception EInvalid Op in module mbam-setup.exe at 778500F5. Invalid floating point operation." This appears a few times (total error messages 12-17), then everything closes.
Occasionally, when I go to install the antivirus/antispyware software, following url pops up http://lsp-test-nax.ind.in/land/eurl/1.html?code=7. Clicking on it asks you to download realav.exe. The one time I clicked on it I denied the request.
The one exception to this is Spyzooka version 126.96.36.199, which I was able to install and to run. However, once it finishes scanning, I'm told it's encountered a bug. I am therefore unable to remove anything (it found 13 infections).
All non-antivirus/antispyware software runs without a problem, just more slowly.
To the best of my knowledge, I have never downloaded realav.exe. It does not appear in my list of downloaded software, there is not a folder entitled Real Antivirus under C:/ProgramFiles, and searching for "real" over the C drive reveals nothing. But around the time this problem started, I was repeatedly redirected to real-av.org, though I only closed the window.
I'm running Windows XP Professional and it automatically updated about 2 hours before this all started. My browser is Firefox version 3.0.4. I can't include screenshots because this is actually a Mac, the problem is obviously on the PC side. The Mac side (running Leopard) is unaffected.
My question is, short of reinstalling Windows, how can I fix this?
Edited by eingvals, 19 December 2008 - 01:28 PM.