I am looking for advice: I wanted to update firefox - the updates (it described itself as 'security') failed. I looked on this website for advice. It said to download the whole version. I did this and the file won't run. I cannot update the browser or load on a new version. This is raising red flags in my brain (wrongly or rightly). I know of all sorts of things I could try but having had security issues recently, I would appreciate guidance / wisdom on the matter. I may be paranoid but it looks like there is something wrong. The old version of my browser is running ok for now. Please help.