I'm pretty sure right now that I have a virus on my computer (it's slowed down, freezes up, and I'm getting 'memory low' messages- which all happened the last time I had a virus). I tried downloading/installing the AVG anti virus program and it told me I can't because i already have an AV. But I don't know what it is, if its working properly or not, or how to find it. And apparently (i think) there is still a virus on my computer so whatever i do have isn't working right. So what can i do to find out what protection i have on my computer, and once thats done, what can i do to try and remove the virus myself?