Are you running AVG, Avast or BitDefender 2017 antivirus at the host OS?
If AVG or Avast then see:
for a solution on using both antivirus products along with VMware
In Avast Settings, troubleshooting you should uncheck the "Enable hardware-assisted virtualization" feature.
In AVG Settings, troubleshooting, uncheck "Enable hardware-assisted virtualization" feature.
Note that you will have to reboot to apply the change.
If you are running BitDefender 2017 at the host then the only solution that I am aware about is to uninstall and revert to an older version of BitDefender.
Wil| Author of Vimalin. The virtual machine Backup app for VMware Desktop Products
| Vimalin : Automated backups for VMware Fusion and VMware Workstation Professional
| More info at https://www.vimalin.com
| Twitter @wilva
| VMware Wiki at http://www.vi-toolkit.com