hi 7david, sorry that this is affecting your system. this forum however is dedicated to answer questions about firefox and other mozilla products, so we won't be able to give you guidance with general issues on your system unfortunately. you can read up on more information about cryptolocker malware at http://www.bleepingcomputer.com/virus-removal/threat/ransomware/ - bleepingcomputer also has very helpful forums where you can get assistance about how to deal with windows security issues. thank you for your understanding!