Antivirus detector for Mac

Anyone know of a decent, free virus detector for Mac OSX? Lately, I've been having big fcuking problems with this stupid fcuking virus that makes every program quit unexpectedly every now and then. Hell, my computer's crashed several times due to it. To put it bluntly, I'm fcuking sick of it. My current antivirus can't detect it and I'm looking for a new one. You guys know of any?

Time stamp?

You had to ask me. I am not sure how I got to it, but computer have this thing, where if a virus or something like what happened with you gets into your computer, you can use a time stamp to delete all new stuff that could be fcuking up your computer and it goes away.

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That's the problem. I've had this virus for a while, now. I didn't do anything about it in the early stages cause I just suspected it was a problem with the current versions of my programs, because it was only happening on a select few.

Safari (my internet browser).

Although it may be due to the fact that the versions of all the programs were outdated. I just received a system update, so I'll get back to you on the progress on this virus/bug. It's possible that it's gone.

An OSX. Kicks Window's ass, I might add.

I actually updated my computer for the first time in six months.