After working flawlessly for months, all of a sudden I cannot launch guests on VirtualBox. When I attempt to launch a VM, I receive the error:
WinVerifyTrust failed on stub executable: WinVerifyTrust failed with hrc=Unknown Status 0x8009200D on '\Device\HarddiskVolumeX\Program Files\Oracle\VirtualBox\VirtualBox.exe' (rc=-22919) Please try reinstalling VirtualBox.
I've uninstalled and reinstalled VirtualBox (5.0.0.r101573), and also deleted and re-imported my OVA Appliance, but am still receiving this error.
From this post here, seemingly Windows Security Update KB3081320 breaks VB.
I've confirmed that after removing KB3081320 via
wusa /uninstall /kb:3081320
and rebooting, that I can load the VM again. However I do not feel comfortable with this workaround as security is now potentially compromised.