I am running a Dell Dimension 4600, Pentium 4 2.40 ghz, 512 mb RAM, 80GB hdd, about 2/3's full. This thing over the last few months has just really started to slow down. It just seems to drag when going from web page to web page and opening a program takes maybe 15 seconds or so. It's all original purchased new sometime in 2003 if I remember right. Also the video on some sites just isn't right any more. It stays on 24 hrs a day, never turned off. I'm trying to decide whether it would be worth it to upgrade the RAM to 2 GB (~$100) and get a new video card with more memory or to just get a new computer. Other than it slowing down I have no complaints. We don't do gaming or anything like that, just web surfing. I run ccleaner, malware bytes and MS Security Essentials so I'm hoping the drive is fairly clean. Thoughts on the upgrade? Also, thoughts on keeping it on all the time vs turning it off every night. Thanks.