You can also try this
1) Click the Windows Start button and select "Control Panel."
2) Double-click the "Administrative Tools" icon. In this list of consoles, double-click the "Internet Information Services" icon. This opens the IIS settings console.
3) Right-click the directory from which Web browsers are receiving the 403 error. Click the "Properties" entry in the menu.
4) Click the "Directory Security" tab in the Properties window. Click the first button that is labeled "Edit" in the "Anonymous Access" section. In this window, check the box that says "Anonymous Access." Click "OK" to return to the Properties window.
5) Click the "Directory" tab in the Properties window. Ensure that no other check boxes except "Read" are checked in the "Permissions" section. This allows users to read and browse website pages. Click the "OK" button.
6)Verify the changes by opening your Web browser and entering the website domain in the address bar.
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