Every time I go into a Multyplayer game on GTA IV PC and I start LCPDFR it says my computer is two slow. And I cant update my GTA because it says GTA IV/Media.1.cab isnt found.

What exactly are your PC Specs? Sometimes when that error occurs, it could be a lot of things running in the background of your computer. I have also faced this problem on my computer and I know for a fact my PC maxs the specs of this game. So I just reset the computer back to factory and reinstalled the game and it worked perfectly fine for me.

hmm well i dunno i have the same problem on my laptop, i can play gta 4 easily with it too.

before i bought it i benchmarked the whole laptop to see if he can run it. and i could run it on high he said.

it doesn´t on low i get 15 fps.

but i can run battlefield 3 on medium with quite some fps going (dunno how many)

-Snippro12

I have the same problem even while i run at 90 FPS while playing world needs to download at start so the first 10 seconds i lagg,

Best thing to do is try it over again till you wont get kicked.