I have 6gb in my system but my pc can only use 1.99gb, this occured today, before it was normal 6gb.I did unplug my pc yesterday before this hapopend but i dont see how that would affect this since i unplugged it before and nothing happend.
Found the solution, looks like one of my ram stick got disloged a bit and wasnt all the way in after putting it back it works and shows all 6 gb of memory