hellp! Can not start up virtual machine with error IMachine {b2547866-a0a1-4391-8b86-6952d82efaa0}

[Orane Panda]

the error informations:

The virtual machine 'Custom Phone - 4.1.1 - API 16 - 768x1280' has terminated unexpectedly during startup with exit code 1 (0x1).
More details may be available in '..\Logs\VBoxHardening.log'.

Result Code: E_FAIL (0x80004005)
Component: MachineWrap
Interface: IMachine {b2547866-a0a1-4391-8b86-6952d82efaa0}

OS: WIN7 x64

thanks .

[socratis]

Please read really carefully the following FAQ: Diagnosing VirtualBox Hardening Issues.

In your case I couldn't find any of the usual suspects, the antivirus ones, so I suspect that it might be a system DLL that has been modified, and in particular "uxtheme.dll". Are you using any custom themes? In any event, look at the "sfc /scannow" option. Read the linked article for more details...