[ubuntu] Freezing On Or After Login Screen

I dual boot Ubuntu 16.04 LTS with Windows 10. The installation of 16.04 seemed to go really well, and I've gotten everything set up the way I like, but I'm having a couple of weird bugs that are really aoying. Basically most times I try to login, it either freezes on the login screen before I can start typing, or after I enter my password and hit enter, it will just show the desktop background and Ubuntu 16.04 LTS watermark. I can move the mouse pointer around, but that's it! I have to do a hard shutdown, then start it back up. Then sometimes it will work, but usually not. Waking it from sleep on subsequent startups, it freezes at some point. This is all on a fresh installation that runs with no issues while it actually works. How can I fix this?