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I wanna install OS on VirtualBox,but when I wanna to install it,it will return errors:

Failed to open a session for the virtual machine Arch.
Unknown error creating VM (VERR_SUPLIB_WORLD_WRITABLE).


Result Code: 
NS_ERROR_FAILURE (0x80004005)
IConsole {515e8e8d-f932-4d8e-9f32-79a52aead882}

I'm using ubuntu 11.04.

How should I solve it?

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Please update your question to include the Host OS – bodhi.zazen Apr 3 '12 at 19:38
up vote 4 down vote accepted

Seems to be a problem related to the disk permissions settings

From the above link

Had the exact same problem& ran Repair Disc Permissions. After this tried again to open Virtual Box. Then received message including option to download & install Virtual Box Extension Pack. Went to, downloaded Oracle VM Virtual Box 4.0.6 Extension Pack (ALL PLATFORMS), installed same and Virtual Box again opens and operates correctly.

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