Pip - Fatal error in launcher: Unable to create process using '"'

Question

I fixed my issue by...

1. downloading Python 3 at the official website and installing it via express installation
2. Copy & Paste the standalone python into the ampps/python folder and overwriting the python version provided by AMPPS
3. running python -m pip install --upgrade pip in cmd

Now pip and python 3 are installed in their latest version.

It seems that AMPPS doesnt't provide a full-fledged python build. So you need to update python yourself.

Thanks to y'all.

The same error, but in a different situation. I have a virtual environment, in which I ran, in the VE's \Scripts directory where pip.exe is:

pip freeze

I got the error message

Fatal error in launcher: Unable to create process using '"'

There is no space in my VE path (google that error). Then I tried python -m pip install --upgrade pip and got

Requirement already up-to-date: pip in o:\upsdowns\flask\lib\site-packages

so then I tried

python -m pip freeze

and that worked. I think it might be a path issue in the VE, but I'm OK with this workaround.

I'm adding this here because this page is high up when you google that errormessage. In other words, I didn't make a new question, even though my situation is quite different from the OP's. Possibly even, I got into that situation because I didn't add modules to the virtual environment "properly".

Anyway, I hope it helps some.

This worked for me under Windows 10 x64:

Ensure that the Python directories are in the path, e.g.:

# Edit Environment variables so that variable "path" points to the new location.
# Insert these at the start of the list (or delete other Python directories), as Windows takes the first match it finds.
# Run the program "Edit the System Environment Variables".
# Or see Control Panel under "System Properties".
S:\Research\bin\Python375\Scripts\
S:\Research\bin\Python375\

Then:

python -m pip install --upgrade --force-reinstall pip

In my particular case, the error was caused by shifting the Python directory to a new location.

I found a very simple solution to, (Pip - Fatal error in launcher:)

1) You must not have multiple environmental variables for the python path.

A) Goto Environmental Variables and delete Python27 in the path if you have Python 3.6.5 installed.  Pip is confused by multiple paths!!!

run this python code:

import pip
pip.main(['install','flask']) # replace flask with the name of module you want to install

If you need to install multiple modules from a requirements.txt file,

import pip
fo = open("C:/...../requirements.txt", "r")
inp = fo.read()
ls =inp.split()     

for i in ls:
    pip.main(['install',i])

The fastest way is:

python -m pip install pip==9.0.0

If you want the latest pip, you can run

pip install -U pip

afterwards.