Having freezing issues with TF2

Occasionally while I'm playing, my UI will freeze my character in place. I cannot shoot or move, but I can look around. At first I thought it was lag, but no one else around me is affected like they are when I really do lag/disconnect. I can see them all running around. This issue hits me randomly, sometimes when I'm by myself with nothing going onscreen, and sometimes in the middle of a fight.

My computer barely meets the sys reqs, so I play on all lowest settings and use that cfg file that is posted somewhere on these forums. I experience heavy framerate issues if too many people are on my screen at once, but this is much different. I see and can rotate my camera in my usual framerate. I also play on wireless with a 'low' signal, but my ping is usually sub 100 and when I get temp disconnected my entire screen freezes; so this is also not that.

Anyways, there's my issue, help appreciated.

I don't know what the problem is, but I'm having the same one.  Maybe we can start a support group.
1. I'm also on wireless
2. I've connected a cable and it didn't help
3. I'm on Comcast, I didn't have this problem before I moved.  I had FIOS at the old place.
4. I'm running vista ultimate, on a 3 GHz quadcore, 2GB ram, 8800GT graphics.  definitely more than the minimum
5. My ping is usually around 30 on the servers I play on
6. I have the same problem on many servers
7. Rockets freeze, i usually stop, jump backward in time, then back forward, then eat a piece of ammunition and die.  Usually I don't even get to see whatever it is that kills me.

I have a strong feeling its comcast and some kind of lag spike or packet loss, but the game code changes often... so who knows.

Okay, got a new video card and took off the graphics nerfing cfg file. Still getting lock up issues. I don't think it's a connection problem, as I'm constantly at about 50-80 ping, and when I get the lockup nothing else stops. I can still hear people and talk in voice chat and in vent without the 'voice breaks' that occur with lag issues.

I'll have to pay attention to that next time.  I usually play on public servers and there's not always very much voice chat to pay attention to.  It would be nice if it's not a connection problem.  At least then I might have a chance of fixing it.

Well Jimmy TF2 hasn't really agreed with the 8800 video cards so you might be faucked until they make some more drivers for the cards.

I have no idea what might cause the other guy's problem though.

Bean,
Thanks for the advice but I have the following conundrum that maybe people can comment on.

I was playing successfully on this machine, with this card for quite some time... then I moved.

Perhaps the 8800 driver was updated for the worst at about the same time, but I also switched from FIOS to Comcast.  UPDATE: So, there was a new driver already available, but it didn't do squat.

Is anyone else also having problems with comcast?  The bandwidth is plenty high enough, but I suspect some kind of ping spikes.  Is there a console command in TF2 that will display max ping time along with the average? 

I have an 8800 now. >< But it still did it with my old PoS card and my integrated graphics card.

OK, so, it might be just because the traffic is less after 12AM EDT.  BUT, I think I fixed my problem with a FW upgrade on my DLINK wireless router.  It's a DIR-655 and the update to rev 1.20 (which came out a few weeks ago) said it fixed a "WAN speed problem".  So far, it looks like its fixed.  Will have to wait to prime time tomorrow to know for sure.

Good luck.