I haven't had any problems with Toast so far, but I don't have but 1GB of DDR2 RAM. I did discover that on my system, which is socket AM2, I had a problem with reboot and shutdown where I would have to hold the power button in. Also my keyboard and mouse would not function when plugged into the PS/2 ports and I had to use a adapter for them to be USB. Not sure what made me think of it, but I went into the BIOS and turned off legacy USB support and that fixed both problems. Now the computer reboots and shuts down properly with the keyboard and mouse both working in the PS/2 ports. The overall system seems more responsive too, but that could just be my imagination. I have plug-and-play OS set to yes but have tried it on No, and it doesn't seem to make much difference. I'm wondering if maybe Toast has a problem addressing over 2 or 3 GB of RAM?