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Whenever we think about increasing our computer's performance, the first thing we think of is increasing RAM (memory). For the novice computer user, opening up the case and installing memory is out of the realm of consideration. An easy way to increase the memory is to use the ReadyBoost feature of Windows Vista.
When you try to do things on your computer that don't have enough RAM, the system uses the paging file. The paging file is a small area on the hard disk that is used and is called virtual memory.
When information is swapped back and forth between physical and virtual memory, it is called paging. The more memory the system has, the less the system has to access the hard disk to retrieve data, and the faster the performance. However, more RAM is not always a good option. Your system might not have the capability to hold more RAM, not to mention the fact, that RAM is not cheap.