My W11 had VBS deactivated though. Core isolation was on as I knew, I have to test, remember to revert to on after the MSFS or gaming session as recommended, at least the Core Isolation I guess.

 

https://prod.support.services.microsoft.com/en-us/windows/options-to-optimize-gaming-performance-in-windows-11-a255f612-2949-4373-a566-ff6f3f474613?ranMID=24542&ranEAID=kXQk6*ivFEQ&ranSiteID=kXQk6.ivFEQ-kO7TBbOLBUmYvuOs1s1W4g&epi=kXQk6.ivFEQ-kO7TBbOLBUmYvuOs1s1W4g&irgwc=1&OCID=AID2200057_aff_7593_1243925&tduid=(ir__rdpjgfmyk9kfbnr3hlaqofswf32xqpam1fbjrkyr00)(7593)(1243925)(kXQk6.ivFEQ-kO7TBbOLBUmYvuOs1s1W4g)()&irclickid=_rdpjgfmyk9kfbnr3hlaqofswf32xqpam1fbjrkyr00

 

Microsoft uses virtualization in Windows 11 for scenarios including Hypervisor-protected code integrity (HVCI), also called Memory Integrity, and the Virtual Machine Platform (VMP). 

VMP provides core virtual machine services for Windows. Memory Integrity helps prevent attackers from injecting their own malicious code and helps ensure that all drivers loaded onto the OS are signed and trustworthy. It will be enabled by default on all new Windows 11 devices. Enabling security features on by default is based on the evolving threat landscape and the responsibility Microsoft has to protect its over a billion Windows users.  

As part of continued testing and feedback from users, Microsoft has seen that in some scenarios and some configurations of gaming devices there may be a performance impact with Memory Integrity and VMP on.  

Windows provides choice and control for users to configure their PCs to meet their specific needs, including the ability to turn Windows features like Memory Integrity and VMP on and off. Gamers who want to prioritize performance have the option to turn off these features while gaming and turn them back on when finished playing. However, if turned off, the device may be vulnerable to threats.  

Below are instructions to turn off these features. 

Turning off Memory Integrity  

1. Select Start , enter ‘Core Isolation’ in the taskbar, and select Core Isolation from the list of results to open the Windows security app.

2. On the Core isolation page, turn off the toggle for Memory Integrity. You might need to restart your device.                                 

Turning off Virtual Machine Platform (VMP) 

1. Select Start , enter ‘Windows features’ in the search box, and select Turn Windows features on or off from the list of results.

2. In the Windows Features window that just opened, find and unselect Virtual Machine Platform. 

3. Select OK. You might need to restart your device.

 

Tested: Default Windows VBS Setting Slows Games Up to 10%, Even on RTX 4090 https://www.tomshardware.com/news/windows-vbs-harms-performance-rtx-4090

As under discussion here - 

 

1 hour ago, St Mawgan said:

As under discussion here - 

 

Ah ok, I didn´t find it, moderator can delete then this thread if considered.

And even better if disabled in BIOS Virtualization, in cre di ble, it is like to have a new hardware, and this time measured with real numbers and no "feelings". I had already all the Virtual related W11 features as recommended before these last tests and in the first one benchmark test in the linked Topic, though now disabling Virtualization in BIOS… a new machine again. I enabled the core isolation in Defender, then I rebooted, then I went to BIOS and I disabled Virtualization and VOILÀ, the same sure that directly to have disabled the Core Isolation sure and then Disable the Virtualization in BIOS, but I did it so, just in case.

This time 25% better in average, (20% better if only Core Isolation disabled in Defender-W11) lows almost the same fps:

https://forums.flightsimulator.com/t/universal-repeatable-msfs-2020-benchmark/586159/8?u=jgl574

 

This is a must to have it disabled in my case for MSFS, yes or yes.

Edited May 10, 20233 yr by peloto