We understand users share their computer, so please make sure your account has Administrative rights.
Make sure your time and date along with timezone is correct and up to date to the exact time.
- Press [Windows Key] + R
- Type cmd
- Press Ok
- Type the following command: net start w32time
- Press Enter (This will start the time sync service if it is currently not active.)
- Type the following command: w32tm /resync
- Press Enter
This will re-sync your clock. If it fails, you may manually have to set your time and date.
Configure your network settings to use Google Public DNS:
In some rare cases, a player may have a DNS server that can cause issues with authentication. We suggest try switching to Googles's DNS servers temporarily to see if that helps resolve the issue: https://developers.google.com/speed/public-dns/docs/using?hl=en#test_your_new_settings
Dungeon Defenders 2 cannot be shared. To disable Family Sharing, log into the Steam client and visit the "Family" tab in Settings, where you'll find a button to "Manage Other Computers..." Here you can deauthorize any computer or account that's been authorized to share your games. You can also remotely deauthorize devices from the web. To do this visit your Account Details online, and then select "Manage Family Library Sharing". Using either the client or the web site, you can view all currently authorized devices and accounts and disable any or all of them.
Steam Name Change:
Please make sure your name doesn't contain any special characters such as @, !, >, <, _? or Umlauts and is longer than 3 characters, as this usually resolve these types of issues.
Disable Firewall/VPN/Anti Virus
We ask that you disable your firewall, including the one on your router/modem, VPN's (Like Hamachi) and any antivirus/threat programs you may have running.
Depending on your OS/Firewall, here are instructions on how to disable your Firewall: http://www.sevenforums.com/tutorials/542-windows-firewall-add-remove-exception.html
Right click the game on your Steam library and select "Delete Local Content". After the game is uninstalled, re-install and try again.