although I can install and run Iron (v25.0.1400) on Windows 8, and I've currently got it running on 3 machines (2x64 bit desktops and 1x32 bit netbook), the same fault occurs on every machine. Viz the first time it is installed, everything works as advertised, including the desktop, taskbar and start menu icons (I use Start8). However, after a few hours, and even without a reboot, the icons become useless. and if clicked, respond with "Class Not Registered".
Despite which, if I run the program either from the program menu or by doubleclicking the iron.exe file directly, the browser fires up normally, so there clearly is no "real" class registration issue.
It's worth emphasising that this is strictly a Windows 8 Issue. I also have Iron installed on Windows 7 and a few XP machines. None of those have exhibited the same behaviour (so far)
At a guess, I think its a "path" issue, despite the fact the icon/lnk properties are set up to start in the appropriate folder.