# Create Directory for Certificate File
New-Item -Path 'C:\cert' -ItemType Directory

# Change to that directory
set-location C:\cert

# Download Certificate From URL
powershell -command "& { iwr https://webadmin.schoolsbroadband.net/webadmin/tools/download_proxy_cert.php -OutFile ca.crt }"

# Install Certificate to Root
Import-Certificate -FilePath "C:\cert\ca.crt" -CertStoreLocation Cert:\LocalMachine\Root