Hello, I am using Windows 7 and I want to keep this system. I have changed systems on other computers and it caused software glitches that never went away. I am sure that my PC would get slower with a different system, and who knows what else might happen. I do not have time for trouble. I'm in the middle of a project and if I had the money I'd get a separate laptop for internet use, but I cannot do that right now. I am wondering how to protect my Windows 7 PC from ransomware and any kind of spyware that reads credit card numbers and passwords. I know to not click on weird links, and I probably won't have any need to download anything, but I do need some kind of protection from viruses and ransomware etc that might sneak in without me doing anything foolish. Would it help to use Avast's secure browser? Would a free version of Bitdefender or Kaspersky be sufficient? Thanks for any advice.