Fixed. The problem turned out to be connectivity related. I'm guessing that a BBO game uses an underlying TCP session that needs to be persistent. So if the client PC jumps between connections, the PC makes a DHCP request, gets a new IP, and the BBO session fails. But let's get back to the problem. This PC has two internet connections, one via the Ethernet port (through power line adapters) and another via Wi-Fi. As expected, the PC was set to always prefer Ethernet. To isolate the problem, I turned off the Wi-Fi radio on the PC and discovered that from time to time, the connection failed entirely. This was news to me, I thought the powerline adapters were rock solid. The reason her email/web browser continued working during past failures was that these new sessions, opened after a connectivity switch from wired to wireless, launched a new session over whatever connection was now available. So I had a home entertainment company come to the house and string Ethernet from the PC to the router. Re-enabled the Wi-Fi as the laptop sometimes hits the road. Problem solved! Robert