virtualbox.org

Hello,

To preface this, I must say that I use my VM at least once or twice daily, and this issue has only come about since the last time I powered off my HOST, not my guest. Recently, I tried to start up my VM from power off, but I was unable to. The machine starts off very choppy, running at approximately 2-4 frames per second, and when it gets to the "starting windows" screen with the windows logo, the logo comes in and brightens/darkens as normal, then the error will pop up a few seconds after that. I've tried running system restore on the guest but this has failed to elicit any change. Nothing changed on the host and very little changed on the guest since last time I was able to run it, and by this I mean that only files had been downloaded, no settings had been changed. attached are the logs and an image of my screen at the time of the crash. Please let me know if any more information is needed.

Thanks

Two things are wrong:

1.
Not enough host memory available:

00:00:07.360194 Host RAM: 7126MB (6.9GB) total, 3453MB (3.3GB) available
00:00:08.315808 RamSize (in the guest) = 0x0000000100000000 (4 294 967 296, 4 096 MB, 4.0 GB)

At this memory setting you should run the guest before starting other host programs. Or reduce guest memory.

2.
Your log contains these lines:

{timestamp} HM: HMR3Init: Attempting fall back to NEM: AMD-V 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. Or it might guru-meditate. 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. See I have a 64bit host, but can't install 64bit guests. This tutorial has a couple more things to look for in step 2. Be sure these are all turned off.

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.

If your Virtualbox does not start successfully, zip and post another vbox.log. For further info, see https://www.tenforums.com/tutorials/139 ... puter.html