Annoying pop up message

[Latti]

Five days ago I was in a porn website and I started receiving a system error pop up when I change websites. The message even comes up in Google. I'm not very experienced technically. I know very little. I have run scans with Norton 2007, Windows Defender and Spybot - search and destroy. They all say I'm clean?

This is the pop up - System Error - Your computer was infected by unknown Trojan. It’s dangerous for your system (critical files can be lost) Click OK to down load the antispyware program to clean your system. This program costs about $60.

The pop up is Very annoying! I have to click cancel every time the message pops up to get things moving. It pops up a lot! How can I fix the problem or should I pay Norton Support $100 to fix it for me? A $100 is a little much.

Latti

[md usa spybot fan]

Consider posting in the Malware Removal forum and having someone take a look at your system.

If you decide to have an experienced malware removal specialist assist you, please follow the procedure in this link to run scans and produce a HijackThis log:

• "BEFORE you POST"(READ this Procedure BEFORE Requesting Assistance).

After you have completed the required scans and produced the requested logs, start your own thread in the Malware Removal forum, making sure to post the logs produced from the above instructions.