virtualbox.org

Very long time everything worked fine, but today there was no successful launch of VM.
When I press "Start" button, new black windows appears and, one second after, my PC gets rebooted.
Logs and some settings attached.

Main OS: Windows 7 Ult 64 bit
Guest OS: Windows XP Pro 32 bit

What should I do to resolve this problem?

Thanks.

Possible regressions with version 4.2.18 should be discussed HERE where the DEVs can find it.