@DOA said: If you think about it, from a privacy point of view, if nothing else, there really is no reason for a web app to be checking my CPU, memory, hd size, etc. Especially if it hasn't asked for permission first. Exactly. I doubt we'll see a future version of JavaScript which has hooks for looking at the user's configuration.You could build a database of IP addresses and OS's, then whenever a patch is released, you know exactly who is vulnerable!