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I am running Ubuntu 12 on Virtualbox(version 4.2.6) on Mac OS X. I installed the Guest Additions by following the instructions from here( and now after I restarted, it gets stuck on the initial screen with the Ubuntu logo and the loading bar which is all lit up.

How can I get around this and perhaps revert the latest changes with the Guest Additions(I assume they are what is causing the problem)?

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latest virtualbox has a feature called 'snapshot' which can keep a history of the guest os. you can revert to any history point if you like. – sgx1 Jan 2 '14 at 10:07
sgx1, I'm assuming I don't have that feature since I am using the older version, correct? Do you think If I upgrade to the newer version it would still be available for past changes or only moving forward? – zeckdude Jan 2 '14 at 10:19
Which guest additions version did you install? Make sure you always install an additions version matching your Virtual Box version number. To remove guest additions see… – Takkat Jan 2 '14 at 10:25
i just checked. version 4.2.6 has snapshot support. but i suggest you to install latest 4.3.x which has more features and bugfixes. snapshots are explicitly created by you. consult the virtualbox help manual for more specifics. – sgx1 Jan 2 '14 at 10:27
@sgx1: snapshots need to be taken before making changes. We can't revert back if we had not taken a snapshot manually. – Takkat Jan 2 '14 at 10:47

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