People who use public or workplace computers for eMail, 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 schools, libraries, and internet cafes, for example, users could unwittingly allow people who follow them on the PCs to see sensitive information in eMail messages they've exchanged. That could mean revealed passwords, conversations with parents about sensitive student information, or viewed web pages detailing online purchases.

"It's clearly a very powerful


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