system slow to respond? slow to start up?
check these minimum and recommended quantities of RAM :
windows XP : minimum 1GB, recommended 2GB
windows vista : minimum 2GB, recommended 3-4GB
when windows runs out of RAM, it uses virtual memory, which is space on the hard disk which can be used as spare RAM. the difference in speed between real RAM and virtual is a factor of billions. also, when virtual memory is being used it means constant hard disk activity which further slows any reading or writing of files.
windows will generally use virtual memory to some small extent no matter how much RAM you have, but will use it fairly constantly if less than about 200mb of RAM is available. RAM is a cheap upgrade to solve major slowdown problems!
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