Google is probably your friend but anyway. Eventually most systems will be 64-bit and without getting into technicalities 64-bit systems:
- Support more memory.
- Are faster if the software has been compiled for a 64-bit architecture.
You probably won't notice much of a difference as a 64-bit system can run 32-bit software. Drivers are probably the only issue, you'll need to get the 64-bit version. The laptop probably has them bundled already and most vendors have 64-bit drivers.
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