Hi roshaan7zafar,
Please do not turn off the proxy, that would result in disabling internet access entirely and cause pip install to fail.
What can help is restarting the VM and making sure not to interrupt the start up scripts - then the proxy would be set up correctly and internet access to allowed sites should work.
If that still does not help you can set up proxy manually by typing these commands on the Anaconda prompt:
set HTTP_PROXY=http://10.0.0.5:3128
set HTTPS_PROXY=http://10.0.0.5:3128
set NO_PROXY=localhost,127.0.0.1
jupyter-notebook