Inspiron 660 Desktop, Blue Screens

I cannot believe how bad Dell has become. I purchased a new Dell Inspiron 660 desktop late September and immediately had problems. Power saving options did not work, and lots of blue screen failures! After multiple calls - reinstalling all chipset drives-checking BIOS, removing a Dell data harddrive from my last computer (which I was assured could be reused), doing all the diagnostics possible, letting them test everything, then reinstalling all the windows software causing me to have to redo all my programs - I still get blue screens and the power saving options don't work. I want a replacement or a refund and all I get is another technician from another country who wants to do more diagnostics. They don't know what they are doing. I simply cannot believe after at least 6 Dell systems over the last 15 years - this is how they treat thier consumers who are trying to buy/use their products. I should not have to do hours of maintenance on a new computer. Since it arrived here in September - I have done more troubleshooting on it than anything else. I have a expensive paperweight.