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I had installed Oracle VM VirtualBox version 4.2.10 r84104 on Windows 7.Then I create a Windows seven operating system(form an iso image file) as a guest on it with a shred folder.But when I try to start guest,I see this warning:

enter image description here

So I reinstalled VirtualBox,but problem remains yet.How I can solve this problem?May be it correspond to this version of VirtualBox?

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Did you create the folder first and then add it in VBox? –  BJ292 Jun 19 '13 at 19:50
    
@BJ292 Yes.I first create folder and then add it. –  hasanghaforian Jun 19 '13 at 19:52
    
I don't see why it would make a difference but you might want to upgrade to the latest version. –  BJ292 Jun 19 '13 at 19:57

1 Answer 1

I juts had the same error and this is how I resolved it: Host OS is Windows 7 64bit, Virtual Box 4.3.12, Guest OS is Oracle Linux 6.4 (at the time of writing this post Virtual Box 4.3.14 has a bug which makes it unusable, so until further notice it is best to use Virtual Box 4.3.12)

  1. shut down Virtual Box.

  2. download separately VBoxGuestAdditions_4.3.12.iso from http://download.virtualbox.org/virtualbox/4.3.12/

  3. rename it to VBoxGuestAdditions.iso and copy over C:\Program Files\Oracle\VirtualBox\VBoxGuestAdditions.iso

  4. Start Virtual Box, start guest OS.

  5. Insert VBoxGuestAdditions.iso disk and run it.

  6. It will (on Linux) compile for a while and afterwards it will allow shared folder (check it as root with df-k, the name shoud be like: shared 604544340 197580404 406963936 33% /media/sf_shared

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