Is it possible that trojans continually advertise anti-virus stuff as a scam to get u 2 pay money fo

I have a program saying I have these things (viruses trojans etc, but it constantly keeps asking me to clean it urgently, how can I get rid of it!!!

Is it possible that trojans continually advertise anti-virus stuff as a scam to get u 2 pay money for the scampop up blocker

Yes.

Get Ad-Aware.

Is it possible that trojans continually advertise anti-virus stuff as a scam to get u 2 pay money for the scamsystemworks

Yes, it is possible, run a scan. AVG , Avast are free antivirus software. Ad-aware, Spybot, Ewido are free spyware removers. You can download free softwares at http://fixit.in/antivirus.html and http://fixit.in/spywareremover.html . You can also run a free registry scan using utilities from http://re7.info
Yes, absolutely. Trojan Zlob which then downloads a Smitfraud infection.

Phony pop-up alert boxes, background changes or "balloon" pop-ups from the tray (by the clock) about a trojan, virus or spyware infection and the attempt to sell you some useless software to "fix" the problem usually indicates that your computer has a Smitfraud infection. It is really extortion-ware, first they infect your machine, then they want $$$ to remove it.

Sounds like your computer may have a variant of this ubiquitous Smitfraud infection.