cant upgrade pip in blender 2.92

Question

I am fairly new to Python and Blender so please excuse my lack of knowledge.

I have been trying to install an add-on for Sverchok (Scipy), but I cant install it using the pip option.

I get a message saying I need to upgrade pip, when I try to upgrade it, this is what outputs to the python console in blender:

Collecting pip
  Using cached https://files.pythonhosted.org/packages/fe/ef/60d7ba03b5c442309ef42e7d69959f73aacccd0d86008362a681c4698e83/pip-21.0.1-py3-none-any.whl
Collecting setuptools
  Downloading https://files.pythonhosted.org/packages/9e/d4/b99a960314121a003e9f39c61dfde01a1010bb47661e193a7722f7f32d52/setuptools-54.2.0-py3-none-any.whl (785kB)
     |████████████████████████████████| 788kB 6.4MB/s
Collecting wheel
  Using cached https://files.pythonhosted.org/packages/65/63/39d04c74222770ed1589c0eaba06c05891801219272420b40311cd60c880/wheel-0.36.2-py2.py3-none-any.whl
Installing collected packages: pip, setuptools, wheel
  Found existing installation: pip 19.2.3
    Uninstalling pip-19.2.3:
ERROR: Could not install packages due to an EnvironmentError: [WinError 5] Access is denied: 'c:\\program files\\blender foundation\\blender 2.92\\2.92\\python\\lib\\site-packages\\pip-19.2.3.dist-info\\entry_points.txt'
Consider using the `--user` option or check the permissions.
WARNING: You are using pip version 19.2.3, however version 21.0.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

I found this link https://b3d.interplanety.org/en/how-to-install-required-packages-to-the-blender-python-with-pip/ which looked promising. But when I attempted to run this (by opening a text window, click new, pasting the code and clicking run) image below of what I have setup in blender) it says it cant install due to WinError 5 Access denied.

The output in python console in blender is this:

Looking in links: c:\Users\CJHMHTPC\AppData\Local\Temp\tmp57u_wh4u
Requirement already satisfied: setuptools in c:\program files\blender foundation\blender 2.92\2.92\python\lib\site-packages (41.2.0)
Requirement already satisfied: pip in c:\program files\blender foundation\blender 2.92\2.92\python\lib\site-packages (19.2.3)
Collecting pip
  Using cached https://files.pythonhosted.org/packages/fe/ef/60d7ba03b5c442309ef42e7d69959f73aacccd0d86008362a681c4698e83/pip-21.0.1-py3-none-any.whl
Installing collected packages: pip
  Found existing installation: pip 19.2.3
    Uninstalling pip-19.2.3:
ERROR: Could not install packages due to an EnvironmentError: [WinError 5] Access is denied: 'c:\\program files\\blender foundation\\blender 2.92\\2.92\\python\\lib\\site-packages\\pip-19.2.3.dist-info\\entry_points.txt'
Consider using the `--user` option or check the permissions.
WARNING: You are using pip version 19.2.3, however version 21.0.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

So it seems I don't have permissions for some reason.

I see that it recommends to use --user option, but I don't know what this means or how to use it. I did some googling, but tbh it's all a bit beyond me, so any help people could offer would be much appreciated.

My end goal is to be able to install Scipy in Sverchok so I can use the 3D voronoi node in case that is helpful information.

Thanks in advance.