If you made the mistake of upgrading your virtual copy of Windows under Mac OS X using VMware Fusion (version 8 here), you may find Windows 10 runs painfully sluggish. The answer? Disable 3D graphics acceleration.

Shut down the virtual machine. Bring up the virtual machine settings (⌘E). Select “Display”:

Deselect . . . → Read More: Windows 10 under Fusion sluggish