Open Task Manager, set it to Details view, and add the Command line column to the view:
Start the PIP installer:
Click Next, Next, Next, Install:
When you see this message, do NOT click OK (yet):
Look in Task Manager and end the last msiexec.exe task that got added. It will be the one with a commmand line entry that says "-Embedding" but does not end with " C". It will look like the following example but with a different number:
Once that task has been ended (aka "killed'), click OK on the error message and the install will continue.