Unable to open/reinstall my jupyter notebook

(ox) C:\Users\dell>jupyter notebook
Unable to create process using ‘C:\Users\dell\Anaconda3\envs\ox\python.exe C:\Users\dell\Anaconda3\envs\ox\Scripts\jupyter-script.py notebook’

(ox) C:\Users\dell>jupyter-notebook.exe
Unable to create process using 'C:\Users\dell\Anaconda3\envs\ox\python.exe C:\Users\dell\Anaconda3\envs\ox\Scripts\jupyter-notebook-script.py ’

(ox) C:\Users\dell>pip3 install jupyter
Fatal error in launcher: Unable to create process using ‘“c:\users\dell\anaconda3\envs\ox\python.exe” “C:\Users\dell\Anaconda3\envs\ox\Scripts\pip3.exe” install jupyter’:

(ox) C:\Users\dell>jupyter notebook
Unable to create process using ‘C:\Users\dell\Anaconda3\envs\ox\python.exe C:\Users\dell\Anaconda3\envs\ox\Scripts\jupyter-script.py notebook’

(ox) C:\Users\dell>python -m pip install jupyter
Access is denied.

(ox) C:\Users\dell>
(ox) C:\Users\dell>