[quote=konr]I only really play TF2 and Dota really, so I'm not sure about other games but in every single one of my games in TF2 or Dota I get these really annoying freezes. My PC isn't under load all of a sudden or anything, I just for some reason have the game completely freeze on me (sound and all) for a few seconds and it happens quite often during playing.

It's really really annoying because it can happen in the middle of a fight or an important moment and that shit loses you games. During this time I can still move my cursor. In TF2 I can during this time accidentally drag the cursor to the other monitor and click, causing me to alt+tab when it unfreezes. In Dota 2 I can still move around my cursor (stylised still as the Dota 2 one) during the time and it seems to just be the "actual" game that does it.

Anyone have any suggestions?[/quote]

Clean your PC, and make sure your temps aren't getting to high.

Update drivers.

All else fails, doing a reformat and fresh install should fix it.

turn of overclock or some shit

I'm on a fresh install, my stuff is clean and my temps are fine :(
EDIT:
And I'm not overclocked.

i'm having the same problem (one thing that might be different is pain markers still show up)
also on a fresh install of tf2 and not overclocked

Another thing that happens immediately after any of these freezes is that I get invisible players and have to do the demo record fix.

tried updating or rolling back your GFX card driver? I got similar freezes a while ago and it turned out to be my card driver choking. Had to remove it and roll back to a previous version cause my PC is crap.
just in case you need to do a clean driver install, this tool removes the video drivers completely (even the windows registry trees are wiped clean) http://www.guru3d.com/files-details/display-driver-uninstaller-download.html