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I want to update to the latest version of VirtualBox. How can I do it without losing the OS I installed and the files inside? How can I backup everything I have on VirtualBox? I currently have VirtualBox 4.0.8 on a Windows 7 64-bit machine and I installed the latest version of Ubuntu on VirtualBox.

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migrated from Jul 29 '11 at 4:00

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I've never had any data loss due to upgrading VirtualBox. Heck, the latest version (at least for Mac) is only 4.0.12 so what makes you think that you'll lose your VM? – Matt Ball Jul 29 '11 at 2:00

Don't worry, you won't loose your VMs (I just updated yesterday). If you really want, you could copy your VDI file (the one containing your hard drive) to another location as backup, and in case something goes wrong, you could make a new Ubuntu VM, and use your backed up VDI as your hard drive.

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Similar question here

Technically you will not lose your virtual machines by just upgrading vbox

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