Anaconda 2 and 3 are installing without errors. I reboot because the installer prompts me to do so. When I open the Anaconda Prompt, python, pythonw or activate.bat aren't found. Looking in the Anaconda[2|3] folder, I can't find expected .exe and .bat files. What's going wrong?
I also notice that conda update --all wants to update many libs and eventually errors out.
Anaconda installs and updates can silently fail due to conflicts with 3rd party antivirus (for me it's WebRoot) programs. An indicator of Anaconda antivirus conflicts is missing .exe and .bat files, and sometimes requests to reboot. The fix is to shutdown the antivirus program and reinstall Anaconda. I suspect Anaconda isn't following correct Windows installer procedures as it's the only installer than conflicts with WebRoot.