I am downloading windows 8 at the moment, I could not resist it, I have to admit you got me infected! What really infected me was not the IAR issue, rather it was the interface and I wanted to see what happens after i apply the registry tweek that disables Metro, if you have 8 installed, try it:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer change RPEnabled to 0. Try to activate it, but first look at IARID, I mean you need to run IARID utility under administrator rights as well. I will try it out and report what results I get. May be this is something to do with the both, who knows.
Please share your results! I have staved off my urge to install 8 so far. I'm afraid it will break only the IMPORTANT dev tools.