Mass Effect 3 Leviathan DLC Freeze at Dr. Bryson's Lab

There is a way around this. Unfortunately it means to delete the DLC. I too have had this problem, it is really frustrating. The good news is that you won't have to start the game over, you just won't be able to play Leviathan. The good news is that you will not have to uninstall and reinstall the game.

I agree that it may not be a ME3/EA/Bioware issue, I think it is Win 10. It did start happening after the upgrade.

Here's what you need to do
1. Back up your game save(s) (Always do this to be safe.)
You need to get the save edit program link below:
http://forum.bioware.com/topic/275079-gibbed-save-editor-for-me3-info-thread/

2. go to your documents folder, open Bioware, Mass Effect 3 then save, select your current game (if you have more than one game save). Back that save up.
3. Run the Gibbed Save Editor, select game save, (It'll list your current game) (I typically select whatever save is on the top. Just remember which you saved the edit to. When you run the game, you'll need to load that particular save for the edit to work. Otherwise it'll be looking for the DLC and tell you it isn't installed.
4. Select Raw Tab. Look for "Dependent DLC". Highlight it. On the far right you'll see 3 dots, click on that. A new window will open with all your installed DLC listed. Highlight "Leviathan"
On the bottom left of the window, you'll have two opetions, "Add" and "Remove"
Select "Remove" This will take the DLC out of your game save. Save to the "save you edited"
5. Go to This PC/OS (C🙂\Program Files(x86)\Origin Games\Mass Effect 3\BIOGame\DLC and delete the DLC_EXP_Pack001 folder (This is the folder)
If you did it correctly, the game should run without a hitch.

NOTE: Please make sure that you back up your game save just to be safe and if something is done wrong. Otherwise you'll have to start the game over.