Hello, I installed windows 7 a few days ago, and deleted windows xp. When I open the task manager it says that my physical memory is 30%, when I just opened the computer and didn't open any program. Also, When I open Internet Explorer, I have a message from the antivirus that the internet is using too much physical memory (about 250MB). I have 2 GB of RAM. Is it ok that the physical memory is 39% now when I only have one Internet explorer window running? And should I add more RAM to the computer? Thanks.