/me sighs
Did anyone else notice that he's only suffering slowdown when he enables shaders? Dude already stated he can get 60fps with them off, so that would mean to speed it up he'd have to?..
[insert dramatic pause]
...Get better graphics hardware. Of course if it's a laptop you're screwed.
Since you're getting a 75% performance drop from turning them on I can only assume your current graphics hardware is either complete garbage or it's Intel who's 64bit drivers are broken garbage.
Also WTF to the post above, seriously. :/