Just in the last four days or so, I began getting an odd notification sound while playing steam games. I'm not sure if steam is significant or not, I pretty much only play TF2 or CS:S. I'll be playing along, and then I get a notification sound through my headphones (short higher pitched sound followed by a short lower pitched sound). Then my mouse will be useless for about 3 seconds when I get another one of those notifications through my headphones, and then everything is normal again (except for me being dead). Anyway, I noticed it on Friday for the first time, while playing TF2 and remember thinking that at least this doesn't happen during CS.
Well, it happens playing source also. I've tried closing all of the crap that runs in my taskbar, but it didn't help. Only thing I haven't tried to close is AVG; gonna try that tonight.
Then, I'm gonna uninstall TF2 and Source and reinstall source. The only thing I can think of that has changed is that I had to upgrade TF2 since I hadn't played in so long.
Anyone heard of this b4?