IIS6.0 in Windows Server 2003 is one of the commonly used Web servers. When I transitioned from IIS5 to IIS6, I encountered a lot of problems at first. Later, after searching for some information online, I was able to resolve these issues one by one. I believe that many people who are just starting to use IIS6.0 may encounter similar problems, so I have compiled some information I gathered online along with my own usage experience to share with everyone.