Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'd like to run windows xp on RDP:

$ VBoxManage modifyvm winxp32 --vrdeport 3389
$ VBoxHeadless -s winxp32 -v on
Oracle VM VirtualBox Headless Interface 4.1.18_Debian
(C) 2008-2012 Oracle Corporation
All rights reserved.

in another window:

$ telnet localhost 3389
telnet: Unable to connect to remote host: Connection refused

Yes, I've read about extension:

$ sudo VBoxManage extpack install Oracle_VM_VirtualBox_Extension_Pack-4.1.20-80170.vbox-extpack
Progress state: NS_ERROR_FAILURE
VBoxManage: error: Failed to install "Oracle_VM_VirtualBox_Extension_Pack-4.1.20-    80170.vbox-extpack": Extension pack 'Oracle VM VirtualBox Extension Pack' is already     installed. In case of a reinstallation, please uninstall it first

Looked through all manuals and all help requests. No success. What's wrong? Any ideas?

share|improve this question
up vote 1 down vote accepted

The problem was caused by the fact that vbox and addition had different versions. You cans see it in the console output.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.