Infectious AgentsA growing number of uninvited guests are pushing their way onto your PCs. Here are the latest antidotes.

Like that unemployed brother-in-law who just wanted to crash onyour couch for a few days, chances are, spyware has moved onto yourbusiness's PCs and won't go away. In fact, it'sprobably having adware and Trojans over for a few brewskies.

As with most uninvited guests, there doesn't seem to be asurefire way to get rid of spyware and its buddies permanently.Your anti-virus software will turn away its rowdier friends, andyour firewall will keep spyware and its cousin, adware, frombroadcasting your most personal details back to their puppetmasters, which is no small thing. Trojans in spyware figuredprominently in the $2.4 billion that Internet scammers stole fromconsumer bank accounts between spring 2003 and spring 2004, reportstechnology research and consulting firm Gartner.