See http://support.microsoft.com/?kbid=932857 "You may receive an error
message when you try to install or run an Office program: 'This patch
package could not be opened' or 'The installation source for the product
is not available'".

miss connie wrote:

> I have had office basic installed on my computer for quite sometime, worked
> well. Then I added another account and e-mail address on my computer,
> office was shared excepted for the outlook. I tried to install with the CD,
> but continously get the message "The installation source for this product is
> not available veify that the source exist and that you can acess it". I
> tried going back and deleting the program from my computer, It still looks
> like it is there on the add or remove list, but I get the same message if I
> try to access it. Please help!!