virtualbox.org

I have a serve problem with my installation on a Windows 7 machine. All the software is up to date. I have several guests configured on an external hard disk and I can start all of them using the same machine booting into another OS, or likewise attach the disk to another machine and access the guests from VM installations from there. But on my paticular main computer running Windows 7, recently when starting VirtualBox a COM object could not be created and the corresponding error message is E_NOINTERFACE (0x80004002). I have wiped my installation, cleaned the registry, reinstalled latest version 'as admin', but that would not work. Then I implemented a hint I read somewhere to run VB in Windows-Vista SP2 ̀- compatibility modus and with admin rights. Ok, now the main app starts, but non of my guests will. Any atempt to start a guest will also result in an error message saying that a COM object could not be created, but the cause is different E_INVALIDARG (0x80070057) followed by a notice that the VM has terminated unexpectedly during startup with exit code 1 (0x1), along with a reference to VboxStartup.log (that doesn't show me anything meaningful). The details of this last error message shows E_FAIL (0x80004005).

@atplsx: You shouldn't cross-post, but in this case it helped because in the other thread you provided a proper log and I was able to give you a reply.

@jamacoe: You didn't provide a log, but see if my answer to atplsx might help you as well.