id summary reporter owner description type status component version resolution keywords cc guest host 12406 Freeze during Windows 8.1 guest reboot after Windows Update cremor "Every time I do a reboot of my Windows 8.1 guest after a Windows Update the guest freezes in the ""rebooting"" screen. This is 100% reproduceable after a Windows Update, even if just Office or Visual Studio updates were installed. But it is NOT reproduceable if I do a standard reboot or shutdown. A Windows 7 SP1 guest also does NOT freeze during the reboot after a Windows Update. VirtualBox 4.3.2 with Extension Pack, Guest Additions 4.3.2[[br]] Host: Windows 7 SP1 x64[[br]] Guest: Windows 8.1 x64[[br]] CPU: Core i5-2500K, all 4 cores assigned to guest[[br]] RAM 16 GB on host, 6 GB assigned to guest[[br]] VT-x/AMD-V and Nested Paging active[[br]] 2 Screens configured for guest, but only 1 currently active in guest Windows[[br]] No 2D or 3D acceleration" defect closed other VirtualBox 4.3.2 fixed windows windows8 update reboot freeze Windows other