CS:CZ Steam Problems

[Snow_Spawn]

OK I downloaded CS:CZ and I started playing it normally, like the story mode thing. SO I beat that then I wanted to kill people on the internet so I clicked on play online using steam button and it did the whole like istalling junk then it said updating steam and it would only go to 27% and it said trouble unpacking (-3). Also I just tryed it now and it says no content servers available. Does someone have a fix for this???????????????