A user who experienced an approximately 8 percent drop in gaming performance after updating Windows 11 to the Windows 11 2023 Update received a fix from Microsoft that resolved the issue.
Reddit user BNSoul measured the performance of his AMD 5800X3D before and after updating Windows 11. “To put it simply, every CPU benchmark shows significantly reduced CPU performance after updating from 22H2 to Windows 11 23H2, even after a fresh/clean install,” explains the user, continuing: “I could go on and on with this list benchmark results, but let’s just say that 23H2 is always 5 to 8% slower compared to 22H2, whether in single or multi-threaded tests.”
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The issue appears to be limited to AMD Ryzen CPUs, at least according to the Reddit thread. However, other users have complained about PCs with Intel 13th Gen CPUs, including on Microsoft’s website.
Microsoft support provides solution to the problem
Fortunately, after a few days, BNSoul received a response from Microsoft that seems to resolve the issue.
“I received a response from Microsoft after 3 days,” the user wrote in an update. “(Support) told me to reset Windows Defender with a few PowerShell commands (1- “Set-ExecutionPolicy Unrestricted” and 2- “Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage”), then reboot and Enable CPU virtualization in BIOS (SVM in my X570 BIOS).”
It continues: “Then in Windows 23H2, open Windows Security and enable Memory Integrity in the device security settings for core isolation. Reboot and the hypervisor should be running, virtualization security is enabled and… that fixes the CPU performance issues, the CPU now performs like it did in 22H2 where I had those security features disabled.”
In other words:
To fix this, you need to use PowerShell (Enter Win + PowerShell) open in admin mode. Then enter:
Set-ExecutionPolicy Unrestricted
Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackageReboot and make sure CPU virtualization is enabled in your BIOS.
Open the “Windows Security” app, go to the “Device Security” section and make sure that Memory Integrity is enabled under Core Isolation. Then restart the computer.
If Microsoft is right, this should hopefully resolve any CPU brakes that may have occurred after updating to the Windows 11 2023 Update. After applying the fix, the Reddit user explained that gaming benchmarks were at expected levels compared to Windows 11 22H2, and even some GPU benchmarks increased.
Note: The article first appeared here at our sister publication PC-WORLD and was translated into German.
