1. Open Internet Services Manager
2. Right click on your computer name and click Properties
3. Select WWW Service under "Master Properties"
4. Click the Edit button
5. Click the Custom Errors tab
6. Locate 404 under "HTTP Error"
7. Click the Edit Properties button
8. Under Message Type, choose Default
9. Click OK
10. Repeat steps 1-9 for any other error pages that you're getting those
Event ID 30's about
11. At the Inheritance Overrides screen (after you click OK to exit the
Master WWW Properties page), click Select All and click OK (unless you have
a directory with custom errors already defined that you don't want to
overwrite)