I resolved a similar host freezing problem following this procedure: http://8thstring.blogspot.com.br/2012/01/error-could-not-locate- dkmsconf-file.html
After that I did: sudo apt-get remove virtualbox-4.1 sudo apt-get install virtualbox-4.1 Problem solved, no more freezing. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/967241 Title: 64bit Windows 7 VM Locks up Ubuntu Machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/virtualbox/+bug/967241/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
