Win7 IIS7.5 cannot be written to the configuration file Web.config how to troubleshoot

An error occurred while adding the default document to the IIS7.5 of the WIN7 or win2008 R2 system: IIS7.5 cannot write to profile web.config, see figure below.

Unable to write that should be a permission issue, although this is a WIN7 system, but the partition is still FAT32 format, no permissions on this piece.

After checking the Web folder, it is indeed a read-only property, remove the read-only property, the problem remains the same, and there is no Web.config files in the folder, there is no such file can not be written or modify the file read-only property.

Check that the default Web site is found to be able to add default documents, in D: Inetpubwwwroot directory has web.config files, this is obviously the default Web site configuration file, but the new site does not renew these settings, first in the default site those configuration, and then the Web.config copy to the target site's root directory, so that is equivalent to complete the site configuration.

Summary: How do you use NTFS disk disks, as long as you set write permission on it, the NTFS format has a number of advantages, if you have not changed, the proposed change