makehumancommunity.org

I cannot open the pythonw.exe file. If I click on it or double click on it, nothing would happen.
BTW, my python is 64 bits. I don't know what's the problem. Restarting the computer and redownloading makehuman are useless.

That is because pythonw.exe needs an argument pointing at MakeHuman.py. pythonw.exe just starts python in "Windowed mode" with no source code to use.

Create a shortcut with something like (on Windows?):
"C:\Program Files\makehuman-community\Python\pythonw.exe" "C:\Program Files\makehuman-community\mhstartwrapper.py"

You could also type this at the command line in cmd.exe or powershell.exe