Watch the video:
Timestamps:
0:00 - Explanation
1:04 - Options
1:26 - Fix 1: Repair Python install
2:21 - Fix 2: Python in PATH properly
4:46 - What to do if it didn't work
trying to install a new PyPi package, but are unable to get pip to work? Does python work? Well, this video should cover all that and more. You should be able to install packages from the Windows command line like normal after it.