When I'm on the net, my browser will freeze up. I can't go forward or backward, nor open websites. But the computer isn't totally locked. I can minimize, and bring up my Norton. This opens the Norton Internet Security window. When I click "scan now" to run a scan, the "Computer Scan" window opens and closes very quickly, just a flicker. And so, I can't scan. If I turn my computer off and back on, which I have do from the switch, the normal shut-down method not being functional, it usually restores things. I have had to do system restore to get things to run, too. Just today, that didn't work, either. I couldn't get the system restore window to work. But just turning it off and on seemed to do the trick.
I'm assuming it's a virus, though I don't know for sure. Any suggestions on solutions that won't run me several hundred dollars?