I just tried it on a third computer and I have the exact same results. Here are the steps to recreate the symptoms:
1. Download the latest AHK installer from
http://www.autohotkey.com/download/Auto ... nstall.exe
2. Install using defaults.
3. At the end of the installation, ensure the option to open the README file is checked. Click finish and the documentation will launch.
4. Click on the getting started option from the menu.
5. Follow the steps to create the google launcher script.
#space::Run
www.google.com
6. Load the script by double-clicking it.
7. Click the help file to ensure it has the focus.
7. Press win+space
8. Observe that if the help file has the focus, the web browser does NOT launch the google web site. I have noticed that something happens, but I can't tell what (open windows are flashing or something... really strange). Sometimes the help file will lose the focus at this point, and pressing win+space a second will work correctly.
Comments
Any time the help file has focus, the script will not properly execute. If the help file does not have the focus, the script will execute properly. If you close down the help file altogether, and then launch it again by other means, the script will execute even if the help file has focus, so this seems to be a one-time deal.
On my computer at home, I tried reinstalling AHK, and going through the steps again, and it did indeed exhibit the same symptoms described above. So this does not seem to be limited to the very first installation. I have not tested the reinstallation on all of my computers.