As student I can use the VMware Workstation 14 for free (but it looks so not the v15).
When I try to install ubuntu 18.04 desktop the disk time of my windows 10 host machine goes to 100% immediately the Ubuntu installation wizard start. When I fast enough I can only select the keyboard layout and than the VM hangs.
The Process VMware Workstation VMX consume all of the disk time.
I tried to change the disk settings that the vm does an instant full allocation.
Other OS also the ubuntu 18.04 server edition install and work without problems.