@LindaB1:

Any chance you are running XP in a Virtual Machine environment?
Any chance you have Hardware Virtualization enabled in your BIOS (if that options exists for your old mobo)?
FYI, I don’t think your Sempron supports AMD-V or the above BIOS option.

FYI, I am running Windows 8.1.1. I have a CPU that supports Hardware Virtualization. I have that option turned off in my BIOS. I do not get that error message.

Please consider the above as just “food for thought.”

Good luck to you.

plsrepli