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Sometimes the uninstall procedure will not be able to remove all the installed components of a PC Tool. This document will describe how to find these components and to remove them manually. The description and figures are taken from Windows XP, but the procedure is not much different for Windows 2000. The examples in this document show how to remove the Packet Sniffer, but the same procedure apply for all the installed PC tools.
http://www.ti.com/lit/swra108