There are many situations that can cause a Windows PC to misbehave, crash,
slow down, and generally not be as efficient as you might hope. One such
situation is a shortage of working memory, or RAM. This is different to
hard disk space, of course. Even if you have lots of spare disk space to
store the things that you're not currently working on, you might still be
running short of RAM because a certain program, utility, driver, document
file or somesuch has been loaded. This tiny free utility will quickly tell
you whether you have a problem or not.
http://www.techsupportalert.com/content/easily-troubleshoot-ram-related-problems-your-pc.htm
