MMMMM how old is your computer let's see your runing with 7.9Hardrive not much room to put anything in the first place.You said that you are runing windows XP sp2 well that windows take's 98mb and on top of that what ever other programs you have on your PC is probley take more room to like if you all ready have Movies or game's or music witch i might say will slow you down if you do not have a lot of hard drive space.For ram you have 512 witch is good but with windows Xp sp2 it's take a lot of ram about 128-256 for good use of windows xp and like up top what ever programs are runing will take more ram witch means you probley only have one or two 100mb of ram to use left.MMMM you said you have broadband right ok is it your's or are you shareing withsome one else because if you are shareing some one eles it might just slow you down even more because thay might have a fire wall blocking you.And i no netgear i have a wireless but mines a bilken .works great

All in all not to be rude or anything but looks like you could use a new computer.
Chris B.........