I used the existing guests yesterday with no issues and closed the sessions (saving the state). This morning, upon trying to restart a session, I received the following error:
And then when closing that dialog (slightly redacted):(rc=-5460)
Please try reinstalling VirtualBox.
where: supR3HardenedWinReSpawn what: 1
VERR_SUP_VP_THREAD_NOT_ALONE (-5640) - Process Verification Failure: The process has more than one thread.
I've tried uninstalling VirtualBox and then re-installing VirtualBox (using Run as Administrator) as well as most of the other suggestions in the "Diagnosing VirtualBox Hardening Issues" topic:Failed to open a session for the virtual machine [MY VM NAME].
The virtual machine '[MY VM NAME]' has terminated unexpectedly during startup with exit code 1 (0x1). More details may be available in '[LOG DIRECTORY]\VBoxHardening.log'.
Result Code: E_FAIL (0x80004005)
Component: MachineWrap
Interface: IMachine {85cd948e-a71f-4289-281e-0ca7ad48cd89}
- I temporarily disabled the real-time antivirus (Symantec Endpoint Protection).
- I did NOT uninstall the antivirus, as I don't think my employer's IT team would be OK with that.
- I made sure Hyper-V was disabled.
- I discarded the saved state for one of the guests and tried to restart it from there.
- I fully powered down the host and then restarted it.
As an aside, I was using VirtualBox 5.1.30 when this started this morning and then installed 5.2.4 to see if that would help (it hasn't). The error message above is what I'm currently getting with 5.2.4, but it was largely the same for 5.1.30. (The UUID on the "Interface" line was different.)
According to the hardening log (attached), it's exiting with Exit Code 1, and the last DLL mentioned is ntdll.dll, but I don't know how to interpret the log beyond that. This occurs with all existing guests and a new one I tried to create.
Thanks for any help! I'm happy to try more stuff out, do some debugging, etc. Just not sure where else to look.