I recently got a new computer. 3GHZ, Pentium 4, 512MB RAM. And I've run into a problem. It's very random, but sometimes, when I click something, it takes over 2-3 minutes for it to load and the computer makes a weird noise while its loading. Like it's trying to load and it only does this sound when it's trying to load but taking forever. Starting up the computer, once I get to Windows XP, takes about five minutes. I've tried defrag and everything. Anybody got any idea?