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New PCs Must Be Protected, Patched: Page 3 of 3

"They should also turn on the automatic update feature of the anti-virus program, if it has one," Belthoff said. That will protect the PC against the hundreds of new threats that hit the Internet each month.

Although consumer-purchased PCs may account for the majority of end-of-the-year systems, businesses deploying new machines also need to make sure that a firewall's installed, updates are downloaded, and anti-virus software is up-to-date.

"The same cautions apply to them as well, perhaps even more so, since these machines will be used for critical business functions," Belthoff said.