I have a Mac OSX 10.6.8 with Snow Leopard . It has not been updated. I had Genio on for a while.I recently accidentally downloaded MacDefender. I now have the following problems My dock and all of the icons have disappeared and I can't recover them. My email accounts have disappeared. All I have is a blue screen The only thing I can access when I reboot is u torrent. From there I can get to the Apple Icon and access Recent a items.This gives me access to a limited History file from some days ago, to Safari in the top dialog box and thence to limited search facilities and uploads.I can also access my System Preferences. I deleted caches, history's and cookies. I cannot use my email. Researched forums on my iPad and registered here.I download and tried to use MalawareBytes but as I only have 10.6.8 and cannot upgrade at mount to 10.7 ( is this possible under normal circumstances?) I cannot use it or debug my system. I did manage to delete some of the notified malware using the Malaware Bytes but it seems I have other remaining issues. I get Genio pop ups even though I have deleted it. I thought I might have Google Chrome problems and malware issues simultaneously but I am not able to delete this or access it in any way. I suspect I may have a false Google Chrome icon, doesn't look right. I tried GC forums but nothing of use there. Finally I tried backing up my hard disk onto an external 1TB hard drive using Time Machine but it will only allow me to access my Mac HD 2 and not the external drive. Can anyone please suggest a sequence of solutions that might sort this out please? I can't think of anything else to do. Thank you in advance.