For Windows 8  you need to download and install the 32 bit Help System from Microsoft’s site
WinHlp32
http://www.microsoft.com/en-ca/download/details.aspx?id=35449

For Windows 7  you need to download and install the 32 bit Help System from Microsoft’s site
WinHlp32
http://www.microsoft.com/downloads/details.aspx?FamilyID=258aa5ec-e3d9-4228-8844-008e02b32a2c&displaylang=en

For Vista you need to download and install the 32 bit Help System from Microsoft’s site
WinHlp32

http://www.microsoft.com/downloads/details.aspx?FamilyId=6EBCFAD9-D3F5-4365-8070-334CD175D4BB&displaylang=en