Keep getting ci's

[XenoMorpH]

Hey all!
I'm keep getting ci's when I'm joining servers. I never had this kind of probs before tho. I've got a dsl connection (512/128) with a router-modem. We R havng a small LAN connected to the router with 2 pc's. Since a few days I'm getting ci's and when pressing ALT-TAB I can't get out of the game, but after pressing ALT+CTRL I exit and when I get back into the game, the ci is gone. The other pc doesn't have any ci's.

Even when the other pc is turned off I still get ci's.
It's like sumfn is blocking the download and when exiting the game and entering it again the blocking is stopped.

Config: Win98se, VC: gf4ti4200 with driver version 41.09 (42.01 don't work well), dx9.0.

Any1 has a solution?