The simplest and most basic truth of the matter is,..if you operate a device that can run protective software to prevent the problems discussed here you should,...often as not there is a perfectly free option if you just do a simple search and download the solution,...the key option for all of us is preventive measures,and they are usually the most effective. Most of these unwanted problems recreate themselves whether they are on a mac or pc or linux computer or device and spread themselves from there,...if we are ever going to stop the culprits we ALL have to use some sort of preventive approach instead of sticking our head in the sand and pretending we have an answer to a problem we know is not going to go away and is a matter when not if it is going to happen next,.....you guys ought to try removing the problems from anyone's machine who walks in the door yet keep two or three of your own machines clean along with any flash drives and portable hard drives used at the same time,that you have to use on the infected machines to repair them...its kind of like playing with the used needles in the quarantine ward at the hospital and expecting to stay disease free,..just because you use rubber gloves doesn't mean you won't get pricked with a dirty needle,....