This kind of issue is becoming more common, sadly. Olympus has issued a warning to those who recently purchased the Stylus Tough 6010 shockproof and waterproof camera. About 1700 of these cameras shipped with malware on its internal XD cards.
The camera itself is fine, but the malware on the XD card uses the autorun feature on your PC to launch itself and possibly infect your computer. If you are unsure whether you have an affected camera, you can enter the serial number on the company’s website. (Which is Japanese)