Again, I'm a rookie folder with very few answers. But just for kicks, since my v 6.23 is running fine and yours is not, check to see if you have the rest of the advanced settings set like mine are:
-"Disable highly optimized assembly code" box should be un-ticked.
-"Checkpoint frequency" should be set to '3 min'.
-"Do NOT lock cores to specific CPU" box should be un-ticked.
-"Core network address (advanced)" entry should be blank.
-"Pause work while battery power is being used" box should be un-ticked.
-"Additional client parameters - Restart client to take effect" entry should be blank.
Also, when you right click the F@H icon in your system tray, the menu items "Pause when done" and "Pause work" should not have a check mark next to either item.
Do your settings match these?
FYI: On my Celeron 2.4 machine running v6.23; According to 'SpeedFan', which only shows HDO temp reads 34C @ 100% CPU usage while folding.
This is in an ATX full tower case with 2 case fans and a heatsink mounted CPU fan. I recently removed the heatsink and replaced the thermal paste, and I keep the heatsink blown out on a regular (bi-monthly) basis.
(That's better than my laptop running the high performance SMP2 version which runs 70C folding at 60% which is better than the 80C when I was running both CPU cores @ 100%.)
Hope this helps!
Mike