Sorry to post this twice, but as a reply to an earlier problem about a browser hijack, it might not be noticed. So here it is:
I'm adding this to the above problem. While I'm very grateful for the detailed response, I can't use it without CCleaner, and I'll never trust it again after losing many important downloads.
I still have the problem I wrote about. But now there's more that is very likely connected to it.
Yesterday WiseCare actually made a popup that there were a VAST number of files that I should clean up. Probably done by this browser thief. It's probably transmitting malware through my PC.
Something is making two tones that appear while I'm using my PC. I have nothing to do with it, and there is no regularity to it at all. It sounds a few times every hour, more or less. This is brazenly flaunting that I'm infected.
Happens online or offline. Doesn't matter what I'm doing as long as the PC is running.
The notes are 5-1, or sol-do, which is a combination that is often used to signal a job has been finished.
Once, it played 1-5, for what that's worth.
Just now, it sounded, and my mouse froze. Two seconds later, the sound occurred in reverse, and my mouse returned. Whoever's doing this actually WANTS me to know they're there. I'm having other minor problems with my mouse; might this be caused by the same thing? Sometimes one click opens something, and other times I must click something 2 or more times. Randomly. My screen also flashes often but intermittently, online and off.
What can I do besides formatting C?