How do I know if I have a trojan horse on my computer?

Earlier today when I went to a website my McAfee virus protection said something about a trojan horse being on my computer (I tried to delete it and quarantine it but it wouldn't allow me to). Since then I've been running every diagnostic trojan horse program that I can find. The problem is that none of them say that I have a trojan horse except for one (anti trojan elite). How can I tell if I have one on my computer?

How do I know if I have a trojan horse on my computer?agv

I suggest that you try to carryout system restore to a day previous to the day when there was no virus or any problems. It may be a few weeks or months back. You have to decide the date. Detailed instructions are posted at http://fixit.in/systemrestore.html

The problem is likely to be solved. Then,You insatll a standard antivirus soft ware such as Norton, AVG , Avast ( free antivirus software and Ad-aware, Ewido ( free spyware removers). You can download free softwares at

http://fixit.in/antivirus.html and http://fixit.in/spywareremover.html

How do I know if I have a trojan horse on my computer?antivirus software

i though i had the same virus a couple months ago i running mcafee anti-virus also when checking hacker watch it show traces of [rasmin trojan] so i went too trendmico.com and did a free scan twice no trace of any trojan i believe mcafee handle it from entering my p c.