So I've run through the Institute, got to the end, blown the thing sky high, and I'm supposed to talk to Preston, so I do, but instead of the mission completing the bloody chat with Preston keeps repeating over and over. I've tried leaving the building, but it doesn't complete, I've tried fast travelling - that got it to complete but my companion is nowhere to be found.

Is this an end of game glitch or something? What am I supposed to do at this point to get the mission to complete normally?

Found a work around, unless it's actually how it's supposed to end anyway, I don't know, but...

Push the button

Talk to Preston

Find the keycard

Access the elevator making sure your companion is with you

Exit the building

Fast travel to a settlement (I went to Sanctuary)

This should bring up mission completed for The Nuclear Option.

Of course this could be what's supposed to happen, but it's confused by the fact the dialogue with Preston acts like it's stuck in a loop.

Now I've got a new problem...

Figured I'd start a new game to do it differently... but for some reason, when they exit the pod at the start I can't move my character even though the game itself doesn't seem to freeze, all the sounds etc are running normally, I just can't move... is this a known issue?

Gliches seem to be coming thick and fast these past few days, it's like the games suddenly decided to implode.

Seem to have fixed that one by simply going online... weirdest glitch ever since it's a game that doesn't really need a 'net connection, lol.