id,summary,reporter,owner,description,type,status,component,version,resolution,keywords,cc,guest,host 12373,Windows 8(.1) guests don't run on hosts that don't support hw assisted virtualization,Arend99,,"I tried to install 32-bit Windows 8.1 on my laptop running VirtualBox 4.3.0. The installation aborted early on with the message: Your PC needs to restart. Please hold down the power button. Error code: 0x0000000A Parameters: 0xFFFFFFE6 0x0000001F 0x00000000 0x8138AFAB According to https://forums.virtualbox.org/viewtopic.php?f=7&t=56465 this message indicates that hardware assisted virtualization needs to be enabled to run Windows 8(.1) (32-bit and 64-bit) in VirtualBox. Given that VirtualBox strives to support a wide range of host hardware and OS' it would be great if VirtualBox could support the execution of 32-bit versions of Windows 8/8.1 on systems without hardware virtualization support. While all current AMD processors support AMD-V there is a number of current (and older) Intel processors that don't. Right now Intel's Pentium Processors B940, B950, 957, 967, B970, 977, 987, B980 do not support VT-X. A quick google search showed that these processors are used in a variety of laptops from mainstream vendors like Acer, ASUS, Toshiba, Sony. Even though I lack the detailed knowledge about runtime code patching I think the problem can be solved in software. With VMware Player 6 Windows 8.1 32-bit installs just fine on my system that lacks HAV support",enhancement,closed,VMM,VirtualBox 4.3.2,obsolete,,,Windows,all