When you press Start / Search on your Windows XP computer, you receive:

A file that is required to run Search Companion cannot be found. You may need to run setup.

One or more files are missing or corrupt.

To resolve this problem:

1. Use Windows Explorer to browse to the %systemroot%\inf folder.

2. Right-click the Srchasst.inf file and press Install.

3. If you are prompted for the location of msgr3en.dll and your computer came with Windows XP preinstalled, it is likely to be at C:\Windows\i386. Type C:\Windows\i386 into the Copy Files From dialog and press OK.

NOTE: See Another reason for 'A file that is required to run the Windows XP Search Companion cannot be found'.