VirtualBox – Change Focus from Guest to Host and Vice Versa (Windows Host)


I use Windows 7 host with Ubuntu Server and Centos Minimal guest, sometimes when I move mouse cursor into virtualbox window it will disappear, even I’ve tried to move the mouse everywhere the cursor could not appear outside virtualbox window. I just found that pressing RIGHT CTRL key will bring the cursor back outside virtualbox window

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VirtualBox – Error REGDB_E_CLASSNOTREG (0x80040154)


I’ve upgrade my Oracle VirtualBox on Windows box recently and after restart this box I got error message REGDB_E_CLASSNOTREG (0x80040154). To resolve this problem, just invoke these commands:

VBoxSVC.exe /ReRegServer
regsvr32.exe VBoxC.dll

source:

https://forums.virtualbox.org/viewtopic.php?p=29162