NOTE: You must be logged on as Administrator or as a member of the Administrators group in order to perform this procedure.

Click Start , click Run , and then type the following command:
%systemroot%\inf

NOTE : There are no spaces at all in the preceding command line.

Click OK to open the INF folder.
Locate the file pchealth.inf .
Right-click the file, and then click Install . This will reinstall the files that Search needs to proceed normally.

You will be asked to place your windows XP cd rom in the drive.