3ds Max :: Ribbon Crash On Startup - Unknown Property?

The company I work for has just switched to Max2012 but my machine has a problem with it. I get this error on startup and whenever I open and close the ribbon:

-- Unknown property: "validobjfunc" in #StructolyBoost(undefined:<data>;Public)

It throws open the max script editor window and a message prompt saying the above text. If I press OK, the message goes away. When I close the editor the message comes back and we have a loop!

To get around it I can press OK. Then run script and go to max root > stdplugs > stdscripts > PolyTools.ms

I looked around and saw people had this error on previous versions of max and the fix was to place a copy of polytools.ms in the startup folder. I tried this and polytools.ms crashes instead on startup. To me from the error given it looks like the ribbon isn't loading a script somewhere that it should do. Placing it in the startup folder makes sense as a temporary fix but in this case it doesn't work. I can run the script after every time max has loaded but this is inconvenient and means I can't do any batch operations which I do quite often.

My PC specs are Win XP x64 SP2, Xeon W3550, 12gb ram, quaddro 3800 and dual screen monitors, I also use a Wacom tablet.

The problem happens in both x64 and x86 installations of 3ds max. We have reinstalled 3ds max countless times. My colleagues have identical computers, hardware wise, haven't had the same issues. We're using SP2 patched 3ds max 2012 too.