A. Make sure Hardware Virtualization and Execute Disable are enabled in the BIOS. Also check that the hypervisor is set to load. Run
in a command prompt and look for hypervisorlaunchtype to be set to Auto, as shown here.
Windows Boot Loader
description Windows 2008 R2
If you've check those, the next thing to try is to shut down the machine, wait 30 seconds, then power it back on. Don't just do a restart, actually shut it down.
Next, check some of your more advanced BIOS settings. You need Hardware Virtualization and Execute Disable set to On. There are other options on some newer machines that can cause problems, commonly VT for Direct I/O Access and Trusted Execution. Try disabling VT for Direct I/O Access and Trusted Execution then shut down the machine, go into the BIOS again, and re-enable VT for Direct I/O Access but don't enable Trusted Execution. This has fixed several machines I've seen with these newer capabilities around hardware virtualization.