I'm running Windows 7 and I have these four processes running (they show up in task manager): csrss.exe, winlogon.exe, nvxdsync.exe, and nvvsvc.exe. I know csrss.exe and winlogon.exe are supposed to be an essential part of windows, but these have never shown up in task manager before, and I am unable to find the file location or stop them. And you know how task manager gives it a description? well, these don't have one. In fact, these are the only ones that I have no control over. And all four of these just suddenly appeared recently - I guess I'm just wary because last month I was here to get a particularly nasty little critter removed from my system. Is there a way to see if these four are legitimate or get rid of them if they're not? Many thanks!