ET:QW install problem

So, I decided to download et;qw demo, and when i did it here comes error:
"Zip file is damaged, truncated, or has been changed since it was created. If you downloaded this file, try downloading again"

Well, im downloaded it from 3 other mirrors and when i click it there's error too.

I'd try to repair it, unzip, errors everywhere. Any suggestions?

thanks

oh, install file has 727mb so everything downloaded without probs