If you don't like the changes made to IE after the latest windows update, you can modify your registry to accept URLs that include the username and password in them. (Note, only do this if you're familiar with your registry).

Create a new text file in notepad and cut and paste the following information into it.
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_HTTP_USERNAME_PASSWORD_DISABLE]
"iexplore.exe"=dword:00000
"explorer.exe"=dword:00000

Name the file "urlfix.reg" and save it.

Then double click this file, and it will update the information in your registry.

This will also correct the problem that people have been having logging into NPGMC.

If for some reason you want to remove this fix, follow the same steps but use this information instead...

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_HTTP_USERNAME_PASSWORD_DISABLE]
"iexplore.exe"=dword:000001
"explorer.exe"=dword:000001