This is copied verbatim from a vmware community forum:
Go into VM / Settings / Options / Guest Isolation
UNCHECK bothcheckboxes (Enable drag and drop, Enable copy and paste) and click OK.
Shut down the guest, and shut down VMware Workstation
Reboot the host computer
Run VMware Workstation but do not launch the guest yet.
Go into VM / Settings / Options / Guest Isolation for the guest, and
CHECK both checkboxes
Power On the guest.