My Alienware x14 1st Gen has returned from its maintenance contract. The mainboard (inc NVIDIA GPU and heatsink) was replaced.

Windows 11 was also reinstalled, and everything under Program Files was deleted. It was a struggle to restore the environment, but all the problems were resolved.

>emulator-check accel
accel:
0
WHPX(10.0.26100) is installed and usable.
accel

>systeminfo
Virtualization-based security: Status: Running
                               Required Security Properties:
                               Available Security Properties:
                                     Base Virtualization Support
                                     DMA Protection
                                     UEFI Code Readonly
                                     Mode Based Execution Control
                                     APIC Virtualization
                               Services Configured:
                                     Hypervisor enforced Code Integrity
                               Services Running:
                                     Hypervisor enforced Code Integrity
                               App Control for Business policy: Enforced
                               App Control for Business user mode policy: Audit
                               Security Features Enabled:
Hyper-V Requirements:          A hypervisor has been detected. Features required for Hyper-V will not be displayed.

Thank you.