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If all that fails, follow one of the steps below. Failing to find it, it may give you an opportunity to download the file from the internet. VirtualBox will look for the needed file. In the guest virtual machine, choose Devices -> Install Guest Additions from the menubar of VirtualBox.
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How you get that file to the guest can depend on the OS of the guest - see below.Īfter installing Guest Additions, on some, older guests you might need to restart the guest. Guest Additions are distributed on their own CD image (.iso file) named VBoxGuestAdditions.iso.
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