Vmware workstation V12.5.4 build-5192485 and Avast free antivirus 17.2.2288(build 17.2.3419.6)
Same issue as in other topic:
https://forum.avast.com/index.php?topic=182577.msg1289548#msg1289548
Disabling “Enable hardware-assisted virtualization” on the machine fixes the issue immediately.
I only had this issue since last thursday 16/03/17. I think with an update of avast.