I've had my tower for about 6 years now, and I can't afford to buy a new one just yet. Lately I've been experiencing some issues where the computer gets a bit laggy, sometimes my browser will lock up and display (Not Responding) at the top of the window. Is there anything I can do to help the performance and make the computer run just a little bit smoother? UPDATE 3/5/2016: I am now experiencing some more serious issues. Computer shut down and restarted in the middle of the night about two days ago, and I got a message about a SATA drive not found (I was half asleep when I saw this and just restarted the computer and all went back to normal). Today, I went out to run a quick errand and when I got back my computer was freezing up. I restarted it and on the "Starting Windows" screen, which normally shows up for about 10-15 seconds, was now just hanging there for a while. I let it stay there and after about 6-7 minutes, the computer finally started up. I found it weird that it may be taking so long to start up. Are there any tests I can run or programs I can use to check if there is anything behind this? Thanks in advance.