It uses only 4GB of the available 8GB, hence it may be a 32bit version of Windows.
But it also calls the memory type as "Other", it may be incompatible (as Neemobeer suggests)
Is there a special process which is consuming all those resources? No update being installed?
Try creating a new user and see whether it also takes that much of resources and you know whether it is related with the account or related with Windows.
What are your system specs (manufacturer, type, additons you made, which Windows..)?