Do you get "Page not found" or "Page cannot be displayed"?
Some suggestions:
Verify the system Date/Time is accurate.
Check the language setting in Internet Explorer:
1. Click "Tools" and then select "Internet Options".
2. Click "Languages".
3. Make sure at least one language is listed in the "Language Options"
dialog box.
Clear the browser's cache
1. Click Tools > Internet Options
2. In the "Temporary Internet Files" section, click "Delete Cookies"
3. Click "Delete Files" click "Delete all offline content" click OK
4. In the "History" section, click "Clear History".
5. Click "OK".
Check for any errors being reported in the Windows Update.log file.
Copy and paste "%windir%\windows update.log" (w/o the quotes)
into the Internet Explorer address bar and hit Enter.
Scroll down to the current date and look for the error being reported.
Next, Look for the error message in the Windows Update Troubleshooter:
http://v4.windowsupdate.microsoft.com/troubleshoot/
Please try the suggestions listed. If error persists please post the error
message from the log file.