Windows 7 needs a 1Ghz x86 CPU (though you can use less I wouldn't advise it) and none of those have separate coprocessors. The last x86 CPU I know of with a co-processor was the 486SX which could have a separate FPU coprocessor installed thus letting it preform like the 486DX which did have a working FPU.
i need help with my coprocessor
That is a term that has pretty much gone away with modern systems. What are the complete specifications for the system you have a question about?
Use windows update..it will find it for you...(hes using an AMD)..you can get this with XP...