[xubuntu] Virtualbox warnings and upgrades

Hello,

I run Xubuntu 12.04 LTS AMD64 and have virtualbox, which I use to run windows 7. I keep getting warnings about updating to 4.2 or above versions of virtualbox. It states that updating will break the existing virtualbox package. Seems to be a pretty common issue, and most suggest uninstalling virtualbox and reinstalling. I cannot find a clear, 100% clear, answer so maybe some one here knows: Can I uninstall virtualbox and reinstall it, keeping my guest session of windows 7? I have searched but most seems to be about removing the guest and virtualbox, not updating.

Thanks,

AlphaA