Windows8 has only been around for just 1 day, so at this stage anything is insecure based on advance info, not real experience. My perception is that windows appliions will run in Windows8, but not in WindowsRT which has the interface previously called Metro. The vocabulary is a bit confusing because Microsoft was prohibited from utilizing the Metro title and have not develop a new name. The question is the way easy and convenient will it be. I think so long as people don't use the new interface, MT4 is not going to be any more difficult to use than before, but that is my guess.