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biowizard
Enthusiast
Enthusiast
‎02-23-2023 10:38 AM

Workstation 16 Pro was fast on Windows 10, but crawls on Windows 11

Same computer, Same VM, Same everything except that I decided to update my PC from WIndows 10 Pro to WIndows 11 Pro. Everything seemed to work OK after initial teething troubles (device drivers for legacy hardware, etc), but one nasty side effect, is that at least one of my formerly blisteringly fast VMs is now crawling.

Is there some setting in Windows 11 that I can apply, which will enable Workstation 16 Pro to restore its former performance?

Alas, for now, Workstation 17 (even if it fixed this issue) is not an option, as it breaks one of my other VMs (already reported).

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louyo
Virtuoso
Virtuoso
‎02-23-2023 10:49 AM

Anti virus software? Exclude the VM directories. 

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biowizard
Enthusiast
Enthusiast
‎02-23-2023 10:54 AM

Good thought - but I am only using Microsoft Security Essentials as previously: apart from the OS update to 11 from 10, everything else is exactly as before - apart from the speed of running a couple of my VMs. Nothing else is slower in Win 11 Pro than it was in Win 10 Pro. In fact, many things are faster thanks to the recently recreated (and I guess de-garbaged) registry!

Something else is going on, something that VMware is doing in WIn 11, that it was not in Win 10.

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RDPetruska
Leadership
Leadership
‎02-23-2023 10:56 AM

Smells like Hyper-V engine installed...  

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biowizard
Enthusiast
Enthusiast
‎02-23-2023 10:59 AM

RDPetruska, Hyper-V sounds intriguing, and I will have to admit to not knowing much about it. Is this something new in Win 11 that was absent from Win 10? Or just a setting that used to be "off", and is now "on"? Can it be disabled? And if so, what happens?!

Could ask a zillion more silly questions, but let's leave it there for now! :slightly_smiling_face:

Brian

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biowizard
Enthusiast
Enthusiast
‎02-23-2023 11:03 AM

PS: Just checked, and my Hyper-V subsystem is not currently enabled ...

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biowizard
Enthusiast
Enthusiast
‎02-23-2023 02:47 PM

FOUND IT!

The "memory integrity" feature of Windows 11 Pro is what is severally knobbling my DOS VM.

If I turn this feature off in Win 11 Pro, my VM restores its lightning fast characteristics, meaning I can do substantial systems builds in just a few seconds, rather than minutes.

Now obviously I kind of want to keep this safety feature "on" to protect my Windows 11 installation. But is there any way to tweak Workstation Pro 16 so as not to suffer from it?

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