Shulou(Shulou.com)11/24 Report--

CTOnews.com Among the various security features Microsoft has improved with Windows 11 21H2 is Virtualization-Based Security (VBS), also known as Core Isolation. As the name suggests, VBS is designed to provide "additional protection against malware and other attacks" by isolating computer processes from operating systems and devices.

As a result, Intel's Extreme Tuning Utility (XTU) and MSI's Afterburner are no longer working properly. For example, XTU may display "Overclocking Disabled" on systems that are fully capable of overclocking. The issue appears to be caused by VBS or kernel isolation on Windows 11 preventing these software from accessing various registers, such as the Overclock Mailbox (MSR 150h), which are critical for operations such as overclocking, overvoltage or undervoltage chips. Even if the user tries to change the settings from BIOS, the problem persists. These issues have been reported on MSI devices, but systems from other OEMs and vendors may also be affected.

Although VBS also exists on Windows 10, it is not enabled by default. However, on Windows 11, VBS is turned on by default in a clean Windows 11 installation, at least initially. Microsoft may have turned it off in a later version, but a new report suggests that the most recent Windows 11 update re-enabled it again by default.

VBS has been a hot topic since it was first enabled in Windows 11. There have been reports of poor game performance even when enabled on fully supported systems.

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