About 64 bit Windows: Some of the latest processors (not the P4 I am afraid) are 64 bit processors instead of the usual 32 bit processors. Windows was traditionally written for the 32 bit processors. Nowadays a 64 bit version of Windows exits for thbose people that have the very latest processors in their systems. This overcomes the hard memory limit of 2 Gig per process (among many other things). For you this wouldn't be a solution as your processor isn't capable of 64 bit processing. 64 bit processing means thata in a single instruction 64 bit can be worked on in one processor cycle. This has nothing to do with screen resolution, width of the i/o pipe or the size of anything else in your computer, just the capabilities of your processor. Historically we went from 8 bit processing (the first computers, e.g. Apple II) to 16 bit processing (where computers really started, e.g. the original IBM PC) to where we are now 32 bit processing (when computers became useful, virtually every available computer). In the future (which isn't far away) we will all be used to 64 bit processing (currently available in main-frames and some rare PC like systems). Until then we have to live the current limitations.