If you have PowerShell >= 3.0, you can use Invoke-WebRequest
Invoke-WebRequest -OutFile index.html http://superuser.com
Or golfed
iwr -outf index.html http://superuser.com
If you have PowerShell >= 3.0, you can use Invoke-WebRequest
Invoke-WebRequest -OutFile index.html http://superuser.com
Or golfed
iwr -outf index.html http://superuser.com