Installing third-party libraries error Python version 2.7 required, which is not found in the registry

My Windows system is 64-bit

This question some people say is the registration form does not, the manual registration is good, but I register the time to run the error.

So my approach is:

Delete all the installed Python in this machine.

1, first enter the control Panel, remove the program to delete the well python,

2. Then delete the local file (the entire folder of Python)

3. If you install too many versions of Python, remove

Then re-enter the official website to download the 64-bit Python, and then install the third-party library on it.

Installing third-party libraries error Python version 2.7 required, which is not found in the registry