So I had an issue while cleaning up my SSD, in that Windows 10 would not allow me to uninstall VMware Workstation 12 Player... The Modify and Uninstall buttons were completely greyed out...
After some looking around i found the answer which helped me, and may help you if you have the same problem.
Simply search for CMD (Command Prompt) and run as the administrator user.
Once command prompt has open run the following command to open the old style program manager:
Find VMware Player (or similar name) in the list, click it, and then choose Change on the bar above.
When the installer opens up simply click Next followed by Uninstall / Remove.