64-Bit OS on VM

[kudla188]

Hello, i have installed VirtualBox and enabled AMD Virtualization, but when i updated to Windows 8 (Host Computer) and then try to run old 64-Bit Linux VM it's not work and when i try to install Windows 7 64-Bit to VM, then it's doesn't work. Here is some screen:

Screen of BIOS+VBOX and PROCESS MANAGER

vb.jpg (106.3 KiB) Viewed 824 times

Virtualizace = Virtualization
Povoleno = Enabled
SVM Mode = AMD Virtualization

[noteirak]

Make sure of the following :
1. Virtualization is enabled in the BIOS
2. Hyper-V is not installed, or any other software that require the Virtualization feature of the CPU
3. The VM is configured to use VT-x/AMD-V AND the OS type is set to a 64 bits one

[kudla188]

Thanks! I uninstaled Hyper-V and it's work

[haraldOT]

I have the same problem but I disabled Hyper-V after VM Ware installation complained about Hyper-V. VB still sees no 64bit CPU and VM Ware crashes now the whole machine during setup of W7. I moved to a new machine yesterday with Windows 8.1 from a machine with W7 where everything went fine.

After the third boot it runs now without problems!