Solved: pip hangs after successful operation (sandboxed environment problem)
It turns out that Comodo Antivirus auto-sandboxes any program that it doesn?t recognize, and this included python in the C:\Users\$user\AppData\Programs directory.
This also affects Cygwin and MSYS2 (but not MSYS).
If you are thinking about using Comodo, disable the Auto-Containment feature. Alternately, you may try to add the folder locations to the white-list, but this didn?t work for me.
Have a nice day,
Sent from Mail for Windows 10