The only thing i can think of is to check your settings for Zone Alarm, Ube. Make sure you haven't accidentally stopped the program gaining access to the web. Once you've set it to 'not allowed ever' Zone Alarm will assume you mean it and not ask you again.

If it's not that, make sure you aren't blocking some other program it relies on, instead.

If none of that works, you would probably have to ask the Dota forums, yes...

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