1. Click Start, click Run, type regedit, and then click OK. 2. Locate and then click the following subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp\1.x\ItssRestrictions If this registry subkey does not exist, create it. 3. Right-click the ItssRestrictions subkey, point to New, and then click DWORD Value. 4. Type MaxAllowedZone, and then press Enter. 5. Right-click the MaxAllowedZone value, and then click Modify. 6. In the Value data box, type 1, and then click OK. 7. Quit Registry Editor.