This bug occurred for me playing a mod free game. I started a game from scratch in Survival Mode. Had been playing slowly through the game for a few weeks. Got my character to about level 45 without ever experiencing this bug. Then sent her out to the Glowing Sea to find Virgil. Could not get through the Glowing Sea. No matter what route she went she eventually froze up using VATS on ghouls, stingwings, bloodbugs, or radscorpions. The freeze occurs for me the moment I hit the Q to enter VATS. Don't believe it has anything to do with reloading weapon. It is a hard freeze. I cannot even bring up Task Manager. The only solution is to hit the power button and restart my computer. The only viable workaround I have found was to install Gopher's No Sleep til Bedtime mod. To stress this is only a workaround for the bug. It does not fix it. The bug is there and I never know when it will crop up. After being forced to play a modded Survival Mode to continue with the game I went ahead and added the mod to enable the console. I lost Ada and the only way I could get her back was to use the console. It is disappointing that I cannot "complete" this game in Survival Mode without the use of mods. For reference, I am playing on a PC. My specs are Core i7 6700K 32GB RAM 1TB Samsung 850 EVO SSD GTX 970 Windows 10 Pro