VM crashed and solution it is:
Use the command get-hotfix -id KB3045999 to find out whether the update is installed
c:\>powershell
PS C:\> get-hotfix -id KB3045999
Source Description HotFixID InstalledBy InstalledOn
-------- ------------- ---------- -------------
UserXYZ Security Update KB3045999 NT AUTHORITY\SYSTEM
Now uninstall the update if its available:
On the command prompt type wusa /uninstall /kb:3045999
C:\> wusa /uninstall /kb:3045999
Restart the machine, and you are all set to use the VM again.
Source: https://forums.virtualbox.org/viewtopic.php?f=6&t=67355
