My wife's computer Is Custom built with an Athlon 2800XP processor. Operating system Windows XP Home with Service Pack 1 and all available updates to present (7/27/2004). Recent program installed Norton SystemWorks 2004. When she is typing in Word, Excel, or Outlook Express and when she is playing Free Cell or MooShu tiles, the program infrequently hangs or hesitates for a second or two before carrying out the task. Perhaps one of ten or twenty mouse clicks "hangs." Maybe one in fifty key strokes "hangs" also. She uses Spy Killer and we have a firewall. We're networked and have been for mor than a year but my computer shows no problems. I've exchanged mice and keyboards but the problem stays with her computer.