Google's New PC Search Tool Poses Risks NEW YORK - People who use public or workplace computers for e-mail, instant messaging and Web searching have a new privacy risk to worry about: Google's free new tool that indexes a PC's contents for quickly locating data.    If it's installed on computers at libraries and Internet cafes, users could unwittingly allow people who follow them on the PCs, for example, to see sensitive information in e-mails they've exchanged...