I got these lagspikes before, out of nowhere, and they stopped for about a month. Just a few days ago, they've started up again.
Here's a video example:
http://www.youtube.com/watch?v=OYXnjrkh8ZsI receive lagspikes when I switch weapons, fire a weapon, or when a new object, such as a vehicle or player, comes into view. It does not happen EVERY time these events happen, though.
I use Ventrilo, a voice chat server, while I play Tribes 2. When I receive lagspikes in Tribes 2, the voices of people talking also lags for the same amount of time. The lagspikes last from .5-1 second and can happen as often as three times in a row with a split second recovery between each lagspike.
I'm on a laptop with an NVIDIA GeForce 9200M GS, an Intel Core 2 Duo CPU, and 3040 MB RAM.
I still get lagspikes with no programs running in the background (though it worked fine with programs running two weeks ago).
I don't have a virus.
Thanks, if anyone can help me with this.