No way

My browser is getting crazy after I updated my antivirus program.
You know what?
It keeps opening new pages at all times, but it’s not like movie web or sex movies site, it is a little window shows on the bottom right on the screen of computer,
so…what it is?
It’s your antivirus software warning you that there have viruses in your computer from your website where you were browsing. Right… The first thought come over my mind is to ask myself…did I watch porn website before? Well… I doubt it, actually I haven’t seen that sort of website for awhile… (Is it true? ).
But anyway, that’s not the point, I’ve just said that I’ve updated the antivirus program of mine, so how come they have virus in my laptop? That’s weird because it supposes to be much stronger and has a tough protection than before, but it’s not. So the reason why I strongly believe the problem is my antivirus program is because all the problems came out after that. Yeah, so that’s why! But…
what I suppose to do? Should I reinstall the operating system, do as Eric said? Or just keep away from web?
To reinstall or not, it’s a problem.