VirtualBox suddenly slows to a crawl

[LeoNot]

Pretty much the title says it all: a previously working VirtualBox install on Windows 10 64bit Pro has slowed to an absolute crawl. It looks like it's working for a minute or two, but then comes to an effective stall. Progress is extremely slow. Needless to say unusably slow. Guests are Windows 10 Home, and also confirmed with a Windows 10 Pro VM as well.

Following advice I've seen in other corners of this forum I've examined the VBox.log and VBoxHardening.log, both in the attached ZIP file. Nothing obvious there to me. Host is fully up to date. I've uninstalled VirtualBox and re-downloaded the latest (6.1.20) and installed "as administrator". No improvement. I've also confirmed Hyper-V is off (and as I understand it I wouldn't have gotten as far as I do with it enabled anyway).

Any additional information I can provide? Any other corners I should be looking in?

Thanks for any direction or advice.

Leo

[LeoNot]

Well, further research shows that this post about how Hyper-V can be unchecked but still running (Grrr...) and the green turtle all seem to be on target.
viewtopic.php?f=25&t=99390
It's late, so I'll have to follow those remediation steps tomorrow.

[mpack]

Yes, Hyper-v is still running according to your log.

00:00:02.413019 HM: HMR3Init: Attempting fall back to NEM: AMD-V is not available
00:00:02.443550 NEM: WHvCapabilityCodeHypervisorPresent is TRUE, so this might work...

[LeoNot]

And, indeed, the steps in viewtopic.php?f=25&t=99390 resolved my issue. I'm back and speedy again.

For any that might follow:

While I don't have definitive proof, it's likely that installing Docker for evaluation probably caused this. Uninstalling (which I did before coming here) did not resolve.

Thanks, community, for the resources.

-Leo

[scottgus1]

installing Docker for evaluation probably caused this

Oh, yeah, that's a definite... Docker activates Hyper-V, but probably cannot deactivate it without having to query everything else on the computer that might be using it, or does not even try.

Glad you're up and running!