how I can know if Im running 32-bit or 64-bit on my desktop PC ? ... I have windows XP 2600 built .. some people told me to go to My Computer icon --> right click --> click properties --> General Tab .... but I cant find anything about 32/ 64 bit there !! how I can know that ??
and : what is the different between them ? does 64-bit give better performance ? ? and : is it possible to convert my system from one to another ??

thanks for help

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