Error while installing Nuget package (Warning: Unable to download from URI 'https://go.microsoft.com/fwlink/?LinkID=627338&clcid=0x409' to ' '.)

I have a machine behind proxy and I need to update powershell to version 7 on this machine and install a few other powershell packages.

But when I try to install the "nuget" package then I get error:- Warning: Unable to download from URI 'https://go.microsoft.com/fwlink/?LinkID=627338&clcid=0x409' to ' '.

I read few posts saying that this is due to TLS 1.2 requirement.

I added following line to my code to set TLS 1.2:-

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityPtotocolType::TLS12

After running this command the security protocol shows as TLS12.

But after I run the install command for the Nuget package and it fails with the above error then the security protocol goes back to TLS, TLs11, TLs12.

I am running the powershell under my admin account but the powershell connects to proxy using my normal LAN account.

Why is TLS setting going back to  TLS, TLs11, TLs12. Is it due to the fact that the connection to proxy is under my normal LAN account or something else?

How can I get the Nuget package installed from behind the firewall.