A 403 computer problem refers to an error that you may receive while browsing the Web on Internet Explorer. It typically says “HTTP Error 403 Forbidden.” This error occurs when you, as a client, are not allowed to access a particular server containing a website. This is a server issue, and you, as a client, cannot do anything about it until the server administrator authorizes you access. However, there is also a possibility that the issue is originating at your end. In that case, you need to change certain settings on your Internet Explorer browser to get rid of the error message.  See How to Fix HTTP Forbidden Error 403 in Internet Explorer.

How to fix:

1. Launch Internet Explorer from the Start menu and click on the “Tools” menu.

2. Click to select “Internet Options” Click on the tab labeled “Advanced“

 3. Locate the sub-heading “Browsing” in the list. Click to remove the check beside “Show friendly HTTP error messages.” Select “Apply” and click on “OK.” Go to the next step if the problem still persists.

4. Navigate back to “Internet Options” from the “Tools” menu. Click on the “Connections” tab.

5. Click on the button that says “LAN Settings.” Click to remove the check mark next to “Use proxy server.” Click on “Apply” then select “OK.”

Via Ehow