I\'m just putting this one out there since its a Google Zero-resulter which means I win a prize?
Cannot start IIS Express 7.5 after reinstall from one account, but I
Check that the user its failing has a IISExpress\config folder in their home folder. If not then copy it over from the user where IISExpress is working. This is a common fault when the config files/folders are missing.
IISExpress\config