Hi, I am having a problem with my PC since a couple of days. I always have on my desktop a widget that shows the CPU and RAM usages, and lately my RAM usage is over 75% since it boots up, and that is really weird considering it is always 35% or less. Eventually (today) I searched for system properties of the system of windows and and used other programs that check that things; and even though the windows tells me I have 4gb of RAM installed, it is only using 2gb, and the other programs tells me that I only have 2gbs! DAFAQ?!!
Also the PC is sounding way louder now. The temp is in 41 C.
Here are some pics. Obviously since I began using the photoshop to take the screens the ram usage was higher, but 89% is just ridiculous.

Why is this happenning and how can I fix this??
Thx in advance for anyone reading :)
EDIT: The screens are a bit big, so please make right click and select view pic :D
EDIT #2: Searching the web I found that the windows through msconfig can resolve that, in which you can set up the max ammount of RAM to be usable. Is it recommended to do so??
EDIT 3: msconfig did not solved the problem








