Re: Unknown Program
Well, if I don't know what it does, where it came from and it causes an alarm, you could CAREFULLY find the file named Xz.exe on your system, then rename its extension to something inane like xz.tmp and try rebooting. If it gives you a warning that it can't be found and nothing is broken, it is probably safe to go ahead and delete it. Another option would be to Google that filename and see if it is associated with known spyware. It may simply rewrite itself to the drive if you leave it alone or revisit/redownload again. Hope this helps.
/*What does not kill us, makes us drink far too much caffeine*/