Add me to the list of sufferers. I finally had time (you know, "30 minutes should be enough before going to bed") to do the update and I keep keep getting the "Device Restart" message. I've tried 3 computers and both USB and serial connections. Three hours later and all I have is a HT that doesn't work, cables all over, and the upgrade program worthlessly installed on three computers. I see some notes here about cycling power many times and so forth, so I'll try that tomorrow. Right now both the 990 and I need some rest.