Search Companion Errors

Help !

When we search for files and folders in Windows Server
2003, click Start, and then click Search, we get
an "Microsoft Internet Explorer" error message Cannot
find'::{e17d4fc0-5564-11d1-83f2-00a0c90dc849}, click OK,
it then appears again.
We then receive a Search Companion pop-up window that
displays an exclamation mark in a yellow triangle.After
these three error messages it allows you to Search.
We have tried articles (PSS ID No:816665 & 319949), which
suggests re-install registry key"{e17d4fc0-5564-11d1-83f2-
00a0c90dc849" and "Reinstall the Search Companion Files".

Any further suggestions please
Regards
David