Jupyter 7 installed on new computer shows no 'new python'

Notebook
1

Windows 12 new machine. It had had Python 3.8 but there was trouble with import eulerlab. Uninstalled Python3.8 and installed Python3.12 only to find pip missing. . Finally installed Jupyter and other packages, but Jupyter notebook shows no Python in the New menu.
I had tried pip install jupyter lab also.
Jupyter kernelspec list:
python3 C:\Program Files\Python312\share\jupyter\kernels\python3
Jupyter --version
notebook : 7.0.6

Path was an issue initially, but Python is installed in ‘Program files/python312’
Any suggestions?

2

despairing I installed jupyter lab and that works, no problem. So where might the sudden Jupyter problem (first no import works, then no Python for the ‘new’ menu…) have come from
I think a move to jupyter lab is in order.