id,summary,reporter,owner,description,type,status,component,version,resolution,keywords,cc,guest,host 13521,VirtualBox crashes due to a serious error,hitoshi,,"Hi, I am a beginner, but submit this because recommended by the system message. The vbox runs geust OS Windows 7 on the host OS Ubuntu 12.04, which is intsalled on DELL T7500 64bit. It worked perfectly until I upgraded vbox from 4.3.14 to 4.3.16. After upgrading to 4.3.16, usb becomes unavailable (although I do not know this is relevant to the current trouble). GuestAddition was also upgraded and the setting of vbox has not been changed. After upgrading from 4.3.16 to 4.3.18, vbox crashes quite often, outputting the message from 'Guru Mediation' indicating 'it is a critical error and vbox stops, and you should contact to vbox community or support with sending VBox.log' (though in Japanese). Reinstalling vbox (including extension pack and guest additions) does not improve this situation. It is appreciated to give me advice. Since the size of the VBox.log is too big and it is not allowed to attach it here, I separate it into two. Thanks in advance. ",defect,closed,VM control,VirtualBox 4.3.18,fixed,,,Windows,Linux