Once you've finished the game you can go back and get any riddles you might have missed, you can get back in there (grapple up in the room with the two guards in it) but as it's filled with gas and at that point you don't have the necessary upgrades to get rid of it there's no point.
I've just bought a new laptop and on any given page I have to press Shift+R to get better resolution of pictures, Also when I access a page containing any flash content I have to press Ctrl+F5 to be able to see the flash content.
Is there something I can do so that I get the best resolution of...