Hey guys just wondering if anyone has any insight of where most of this Malware comes from? I have heard of possible exploits in Adobe Reader and Adobe Flash and Java, but have recently cleaned up a machine that got reinfected after all of the above programs were updated. I work in the school system and most of our machines are Windows XP Pro and Windows Vista Business. I would say that about 90% of the machines that get infected are running XP Pro SP3. The schools just purchased Sophos AV and so far that seems to be working, as we haven't seen a machine get infected that was running this AV software. Two of the last infections the teachers said they Googled free lesson plans. I opened the page on my Mac but didn't see anything out of the ordinary.