Hi! I know next to nil about power supplies. I have a computer that xp stops the install after it says it's checking my hardware. I've tried 3 different disks with the same result. All my hardware checks out---I've run extensive tests. The only thing I haven't checked is the power supply. It's an Okia 500 watts. Somebody on a forum said I should get a new power supply. Now, I'm not a gamer---I just use the video card for simulcasts and viewing pics and small movies, but I am using a pcie card. What is a good power supply for $50 or less? Ir doesn't have to be this year's model---I'm sure I could find a $60 to $80 previous year's model on ebay. Also, what are good brands to look at, and avoid, if I decide to spend a little more. Any and all responses will be greatly appreciated. Thanks.