[64 bit] Virtualbox 4.1.X freezes while updating

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http://ubuntuforums.org – Hi, I'm running an Ubuntu 12.04 64 bit LTS. Previously, I never have had a problem with Virtualbox in previous version. But, after upgrading Virtualbox, I need to enable usb controller to access my usb drives, printer, and etc. So, I've downloaded the Extension Pack from Oracle and upgrading it. While upgrading, it has frozen. Since then, I could not access my usb drives. So, anyone with prior knowledge or experience, is welcomed to help me. I'm clueless! P.S; I've uploaded three screen-shots of the mentioned Virtualbox's! Attached Images Scre (Hardware)