"Network Connection Error [Code: 10000005]. Connection errors are typically caused by a temporary server outage, a firewall, or a problem with your internet connection. If it's been a long time since you've connected to Voobly it's recommended that you redownload the client from the website."

I am pretty sure we have no problem with my internet conneciton.Because my roommate can play DOTA and I am listening music on Youtube right now.And I checked my firewall, it allows Voobly..I redownload clients but still same problem..Sometimes I can login and open game browser but lobby gives the same error when I click one of them

I reset modem and restarted PC, problem solved