I am brand new to windows xp and I just bought this computer so it has fresh install the only extra programs I have are microsoft antispyware, zonealarm pro, spybot, spywareblaster and avast antivirus! when I enter (ctrl+alt+del) and check system performance it says I am using 190mb of ram and I have seen it as high as 230mb...is this normal if not what can I configure to free up some ram with out shutting down my security programs?