Lost access to all Virtual Machines after Windows 7 update

[Humpfie]

Help!!!!

This morning my Windows 7 Home Premium servicepack 1 laptop did an update.

Since the update I have no access anymore to my Virtual machines. They all come with this error:

Het is niet gelukt een sessie te openen voor virtuele machine Diverse software.
The virtual machine 'Diverse software' has terminated unexpectedly during startup with exit code 1 (0x1). More details may be available in 'C:\Users\Atymo\VirtualBox VMs\Diverse software\Logs\VBoxStartup.log'.
Resultaatcode: E_FAIL (0x80004005)
Component: Machine
Interface: IMachine {480cf695-2d8d-4256-9c7c-cce4184fa048}

I am running Vbox release 4.3.20

Can anyone help me out??

[mpack]

See the last few messages of the "security" discussion stickied at the top of this forum.

[Humpfie]

Ah, I only looked at page 1 of the discussion and did not recognize my problem.

But on page 5 I see more people with the same problem.

I will delete MS update KB3004394 and try again....