A Trojan recently discovered by Symantec encrypts system files and makes them inaccessible, but doesn’t leave any messages asking for a decryption fee, a common tactic for similar Trojans. According to Symantec, the Trojan adds a .vicrypt extension to documents in Windows, then displays a warning to restart. A company in Mauritius sells a product called Antivicrypt to restore the files, but Symantec offers a free tool for decryption. (CNet)