Hello Richard,
Welcome to Apple Discussions.
Sounds like you have the "PC Freeze". Several of us are so stricken with a few, but not all, of our PC friends. TTF (time-to-freeze) varies, but the symptoms are as you describe for all.
See msg # 22 in iChat MAC to PC Video Freeze after 6.5 min for the work-arounds identified to date.
There is lots more info on what has been tried in that entire thread.
If you find a fix, let us know.
EZ Jim
Welcome to Apple Discussions.
Sounds like you have the "PC Freeze". Several of us are so stricken with a few, but not all, of our PC friends. TTF (time-to-freeze) varies, but the symptoms are as you describe for all.
See msg # 22 in iChat MAC to PC Video Freeze after 6.5 min for the work-arounds identified to date.
There is lots more info on what has been tried in that entire thread.
If you find a fix, let us know.
EZ Jim