Modern versions of Windows require that every system driver be digitally signed by Microsoft. If an update or a corrupted file broke the signature on vmdrv.sys , Windows would refuse to load it. This is like a bouncer checking an ID—if the photo is scratched off, you don’t get in.
Drivers like vmdrv.sys are marked as "boot-start," meaning they load very early—before the user even logs in. If the driver file is on an encrypted drive or a network location that isn’t available at boot time, Windows gives up immediately. Priya had recently moved her VM files to an external SSD; the driver path in the registry still pointed to the old location. vmdrv.sys cannot load
Priya had installed and uninstalled three different hypervisors over the past two years (VirtualBox, Hyper-V, and VMware). Sometimes, uninstallers leave registry keys or half-deleted drivers behind. vmdrv.sys from an old version might still be present, but incompatible with the new software. Windows would try to load it, fail the version check, and throw the error. Modern versions of Windows require that every system