Sure. I installed Ice Dragon by Comodo. It comes with prepackaged cloud anti virus programs that I was unaware of because I didn't read everything when I installed it. Once I uninstalled them, the installer worked fine.
I'm trying to find a lighter browser to use to stream music while I'm in the game and it's one of the ones I'm testing. Firefox works fine for that but it has memory creep. So does WOT. I've only got 8 gigs of memory atm and plan on adding more but in the meantime I'm trying to keep my memory usage down. I have to keep an eye on it otherwise after a couple hours of play, between the browser and the game, I can end up with 90% or more being used. If it hits 100%, which has happened, the computer locks up. So about every hour or hour and a half I shut both down and restart them. After restart it drops to about 35 - 38% and will be fine for anther hour or so. It's a quick fix but it works until I get more memory for my rig. I shut down all unnecessary programs running in the background but still run MSI Afterburner, HWinfo64, and Teamspeak as well. Those 3 don't really use much memory and don't appear to leak much, if at all.
In short, yes, it was an anti virus program that appeared to be blocking it.