According to Scott installation instructions, the multi-user mode is installed. After installation, there is always such problems, and even doubts if there is a problem. Always appear A blog matching the location you Requested Was Not Found. Host = [localhost], Application = [admin] error. When I was about to give up, I finally found the problem. It turned out that IIS issues, in the wildcard application map area configured by ISAPI, be sure to add ASPNET_ISAPI.DLL, the primary is to confirm whether the file must set whether it is necessary to set. This is, I hope that friends who have encountered the same problem should not make the same mistake.