Access denied when editing the content source

The problem
You get access denied when you try to edit the content source in Microsoft SharePoint 2007.
I ran into this error after I changed the "Farm Search Service Account".
Application error when access /_layouts/searchsspsettings.aspx
Error=Access is denied.
(Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))

The cause could be
WSS_WPG group account does not have the correct permissions to the %windir%\Tasks folder on the computer that is running the indexing service.

Fix the problem
Add the WSS_WPG group to the Tasks folder.

1. Log on to the servver that is running the indexing service with an account that has administrative permissions.
Do the following step (2) if you don't have the security tab in the properties section of the %windir%\tasks folder:
2. At the command prompt, run: attrib –s %windir%\tasks
   Note: If Windows Explorer is open when you make this change, you will not see the extra tab in Windows Explorer. If Windows Explorer is already open, close and then reopen it before you perform step 3.
3. Right-click the Tasks folder, and then click Properties.
4. In the Tasks Properties dialog box, click the Security tab, and then click Add.
5. In the Select Users, Computers, or Groups dialog box, type WSS_WPG in the Enter object names to select box, and then click OK.
6. Grant the following permissions for the WSS_WPG account, and then click OK:
   ◦Read
   ◦Write
7. IISRESET.
8. Run attrib +s %windir%\tasks to reset the Tasks Property back to the default view.