A new feature in Google Desktop 3 that allows people to search for documents across multiple computers poses privacy risks and should not be used, a consumer digital rights nonprofit and a security company are warning. Google released the latest version of its desktop search application on Wednesday. It includes an option that allows people who regularly use several computers to search for items stored on multiple computers simultaneously. Once the Search Across Computers function is enabled, text copies of documents and Web history are automatically transferred to the other computer that has Google Desktop installed. When the user searches on one computer for information, the second computer is automatically searched. The Electronic Frontier Foundation warned consumers that the government or litigious rivals could subpoena the search engine for the information stored on the Google servers before it is deleted, which Google said is within 30 days. The threat is underscored by the recent Justice Department request to Google, Microsoft, Yahoo and America Online for random Web search records.