you can reinstall Search Companion w/o the CD by:
Log on to the computer by using an account with administrator permissions.
Click Start, click Run, type %systemroot%\inf, and then click OK.
Locate the Srchasst.inf file.
Right-click the Srchasst.inf file, and then click Install. This reinstalls the files that Search Companion uses.
(from: http://support.microsoft.com/default.aspx?scid=kb;en-us;319949)

Signature
SoniaP
> my search companion has disappeared from my computer says
> the file msgr3en.dll is missing This computer came
> with WindowsXP preinstalled how and where do I get a CD
> Rom disc to download this file?