Question : Problem: Change XP to singe CPU

I re-installed XP on a single core machine and apparently the disk was for an OEM dual core.
How do I set XP to treat it as a single core again?

Taskman actually shows two cores at work in my single core machine.

HP system with P4 630 Prescott Single Core 3.0GHz

Thanks!

Answer : Problem: Change XP to singe CPU

I believe that processor is enabled with Hyperthreading (can be disabled in the BIOS). Thats why it sees it as two cores.....

I dont believe you need to reinstall/repair the OS by disabling it.......

Is it causing a problem?