Hello, I have a system that will not work without significant delay or error messages and there is a Malware defense scan program that will not allow me to proceed. I also have some .dll registry error messages at boot up. I have pornsite icons being placed on all user desktops in Windows xp. I also have a internet security 2010 that does an immedate scan at boot up and gives me a system infected message. Please help. I have attempted your Malware Defense software but my sysem will not run it, the system hangs up. Also, I can not access the internet from some of the desk tops, I have to set up a new administrator to access. Please advise. Thank you.