Launcher freezes computer at whuite Mojang Logo Screen. Computer must be shut off to unlock. I have deleted and reloaded Java and Minecraft to no avail. I have Windows 10 and Minecraft 1.11.2. I have scanned for viruses several times as well.

Minecraft should load normally

What actually happened was:
1. Clicked on Launcher Icon on Desktop
2. Clicked on "Play" in initial Minecraft window that appears.
3. Screen freezes at White Minecraft Logo window that appears next.
4. Computer must be shut down to unfreeze. Unable to right-click and ctrl-alt-del doesn't work.