The "cannot find this file" error is almost definitely caused by IE8.
The only known fix at this time is to uninstall IE8:
http://support.microsoft.com/kb/957700

--
Gary VanderMolen, MS-MVP (Mail)


"Colt" <Colt@discussions.microsoft.com> wrote in message news:FB1A6EFE-B5E5-469E-AA50-814F0128AC76@microsoft.com...
>I have had this problem before, when i recieve email with a Powerpoint
> viewer, it will not open and a message comes up, POWERPOINT VIEWER CANNOT
> FIND THIS FILE. I was told how to correct this once before on this program
> and cannot remember how to fix this. Please help, Mark