HI ! When I start up my vista. it's perfectly fine.... and then when i go to my documents and start browsing through files... then my vista will start loading and loading and loading and makes my pc slow and slow and slower.... taskmanager says nothing is using my memory, but according to the monitor, my ram is 99% used !!!!!! please it's a brand new pc and It's doing this ! help ! it's a 1.8ghz 1000mb ram 120hdd ag all that shit... any advice PLZ !