Open a cmd.exe window ("DOS window"), and use the cd command to get to the directory where web2py.exe is.
For me, that is
cd C:\Users\Dave\web2py_win\web2py_win-2141B
start web2py as a normal server however you prefer (from the command line, or from your IDE)
You can then enter the command
web2py -i 0.0.0.0 -K MyApp
(I don't have a scheduler use on my Windows machine, so this command complains about no attribute '_scheduler'. Where I use the scheduler happens to be a linux machine, for reasons outside of web2py)
On Windows, I start my web2py instance from the command line, and it throws up a small GUI panel. There's a menu item there for Scheduler, but it doesn't do anything for me, probably because I don't have an app here using the scheduler.
/dps