Our company is running XP Pro on our boxes and we just Updated hardware, but now it is locking up randmomly an IT can't seem to figure out why. When we run 2 sessions of Rumba AS/400, on window for Outlook and/or one window for Internet. It's usually on the Rumba session that it locks. We can still get to task Manager to shut things down, but we have to completely reboot to get thins going again. We have 4 Gb of memory, so it's not that. Any ideas what might be causing the lock up.