Beware of virus infestation !! Have the game CD at 10.1. bought. At home we have Windows Vista in the versions, 7 Home Premium and 8, all of the installation attempt was stopped immediately with the analogy of Note, I did not have sufficient rights to access the drive or program, not even as an administrator! After e-mail request from the supplier BHV one knew what to do with this message and gave me download the newer and more extensive version Doppelkopf Clubmeister XXL. Only install blocking remained exactly the exact same type error message. Now we have on all computers Kaspersky Internet Security 2013 for an attempt on the Windows 7 computer I have the virus program disabled. The installation work immediately. BUT: to start after re-activation and trying the game was bright red and loud a virus warning with immediate cancellation of OwnCards.exe file in the game. It was the Trojans Backdoor.Win32.Prorat.qsx. In Internet searches to a was ill, he was referred to by several forum administrators as dangerous and hard to eliminate. It was mostly advised to format the disks involved with complete reinstallation of Betriebsssytems !! I have reported to the company BHV and got the answer that I should not worry, the program is thoroughly tested !! (??). But I have been worried (because I trust a worldwide and millions of widespread and tested protection program more) and have run thoroughly after program uninstall the antivirus software, the case still (remaining?) Found malware and then by System Restore on a week before Installation reset