Computers in Bahrain are among the world’s most-infected with malware and potentially unwanted software, according to a top security expert. Bahrain comes second after Afghanistan in a list of the 26 “seriously infected” nations that run computers on such malicious software, said Microsoft Europe, Middle East and Africa Chief Security Advisor Roger Halbheer. “This is a serious problem, with computer users not apparently realizing they are compromising their own online security as well as that of other users,” he said.