find out number of processors cores in windows 7
The number of cores can be easily find out from the processor family, that you purchased. as sample names like DUAL CORE, CORE i3, Core i7 etc. In windows 7 it can also be determined from following steps.
Right click taskbar > start task manager > performance
it will open task manager and your cores will be shown in the red rectangle as :
cores shown here are 2, because my system has Intel Core2 Duo Processor
Open command prompt and type
C:\Users\john>echo %NUMBER_OF_PROCESSORS% 2