None of my VM's work after upgrading to 4.3.4.91027

[Master VB Guru]

After upgrading my Windows 7 Ultimate (64-bit) host machine to VirtualBox 4.3.4.91027, none of my VM's worked anymore.

Everytime I tried to launch them it told me a hardware setting was not correct.

I have since re-imaged my machine back to 4.2.18.88781 and now everything is working again.

[Frank Mehnert]

Please attach a VBox.log file for a failing session running on VBox 4.3.4.

[Frank Mehnert]

Still no VBox.log file. Please reopen if still relevant with VBox 4.3.6 and attach a VBox.log file from such a VM session in that case.