I have resinstalled my Windows 10 and now can't run Oracle Virtual Box guest OSes in 64 bit.
There is no bitness setiing in VB anymore
Guest OS has 32-bit prefix now:
Althoug image is 64 bit.
Error messages vary, most often is just black screen. If run Ubuntu installer, it explicitly fails due to bitness.
I have 64-bit host OS.
I have Hyper-V diabled in Windows:
I have Intel Virtualization enabled in BIOS.
I didn't find any VT-d setting in BIOS.
What can be wrong?