i have an assembled pc, with dual core 2.5 ghz proccessor, and 2 gb ram, while using the pc i am experiencing some freezing ,on websites or otherwise and performance is not upto the mark, should i upgrade my ram to 4 gb?? will it better my experience??the reason i am asking is because i have an HP laptop too which had 2gb ram initially, and i upgraded it to 4 gb, but i didnt notice any increase in performance, so i am confused.:nevreness:edit- i have windows 7.