Now after the upgrade, it fails to start ANY VM old or new and gives almost same error message saying something like
Failed to open a session for the virtual machine Win7-64x.
The virtual machine 'Win7-64x' has terminated unexpectedly during startup with exit code 1 (0x1). More details may be available in 'C:\Users\admin\VirtualBox VMs\Win7-64x\Logs\VBoxHardening.log'.
Result Code: E_FAIL (0x80004005)
Component: MachineWrap
Interface: IMachine {f30138d4-e5ea-4b3a-8858-a059de4c93fd}
I have uninstalled VirtualBox, cleaned registery, removed all related folders including from profile, .virtualbox etc , resistalled and have tried all that but without any success

The log file is also attached. Basically it seems to be starting to fail with
NtOpenDirectoryObject failed on \Driver: 0xc0000022
Please help.