virtualbox.org

It has been a while since I used VBox regularly. I had it up and running last week and had to re-enable Hyper-V to move some data out.

Hyper-V and other features were installed that blocked VBox. They are now removed. The VBox VMs will start.

The guests will start and barely move. In example, the Win7 logo spins in so slowly it takes minutes to form the flag. Any ideas?

These are the minimal requirements needed to be able to help you find your problem/issue.

The version of VirtualBox you are using is 6.1.6 + Guest Additions not yet updated in the guests.
Host Win10 1909 x64 & Guest Win7 x64, and 48GB to the host, 8GB to the guest.

TIA

Your log contains these lines:

{timestamp} HM: HMR3Init: Attempting fall back to NEM: VT-x is not available
{timestamp} NEM: WHvCapabilityCodeHypervisorPresent is TRUE, so this might work...

You might notice in the guest window's Status Bar the green turtle: The choice of animal is appropriate: Your guest is running, just really slow. This is because a service that uses Microsoft Hyper-V is running on your host PC. Normally Hyper-V blocks Virtualbox. But your PC is of the type and OS where Virtualbox can attempt to run the guest using the Hyper-V engine. This arrangement is still being developed and isn't 100% yet.

If VirtualBox is running without Hyper-V enabled, and nothing else is interfering with hardware virtualization (VT-x / AMD-V), then the usual virtualization icon () will be seen in the Status Bar.

To turn Hyper-V off completely, do this:

1. Shut down all programs. You will have to reboot your host.

2. Look into the 64-bits tutorial, 2nd post, points 2 & 3 and ensure that none of these things are running.

3. Find the Command Prompt icon, right click it and choose Run As Administrator.

4. Enter this command:

bcdedit /set hypervisorlaunchtype off

5. Enter this command:

shutdown -s -t 2

6. When the computer turns off, unplug it for 20 seconds. Then plug it in again and boot up Windows 10.

Your Virtualbox should be running now. If the green turtle still appears and the tell-tale lines are in the log, try all the steps again. If you don't get the standard virtualization icon, post back exactly what you did and we'll try to help some more.

For further info, see I have a 64bit host, but can't install 64bit guests and https://www.tenforums.com/tutorials/139 ... puter.html

The BCD string is now defined (previously missing). That and/or a move back to 6.0 solved it. Your rapid response is appreciated.