Running out of PC memory

  useless at IT 19:12 30 Oct 2014
Locked

I keep getting messages saying I am running out of memory. When I check using system tools I see I am using almost all of my 4Gb of RAM and should delete caches. What are caches and how do I delete them please?

  Fruit Bat /\0/\ 20:14 30 Oct 2014

How much space on your hard drive? What op system?

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