Security firm BitDefender says adware is getting more aggressive in Android apps. Adware can create homescreen shortcuts, alter default search engines and use up memory and processor cycles in ways that degrade performance. There is no easy mechanism for users to detect the issue before downloading programs, security firm says. Some apps featuring such adware are hugely popular which suggests that users don’t object to their effects or simply don’t notice them. The top UK adware was Adware.Mulad, accounting for about 30 percent of detections.”]