In iis7, the default web service takes precedence over the FTP service, while IIS6 does.

Files called in iis7 (for example, files accessed through the web or downloaded through the Web) are updated through FTP, "550 the process cannot access the file because it is being used by another process" cannot be updated, that is, the Web service access has a higher priority than the FTP service, this setting is Microsoft's iis7 Kernel Mechanism and cannot be modified.

Under IIS6, the FTP service takes precedence over the web service and files are being downloaded. If the file being downloaded is updated through the FTP service, the web download will be interrupted and FTP can be updated normally.

Ii7 can update files without affecting customers' downloading. solution: