I was doing my normal day routine on my comptuer checking for Spyware, Viruses etc. Then when it was fixing the spyware my computer just turned off. Im like "oh, its storming outside probably just a power outtage" then i noticed everything else turned on but my Computer, i clicked the button still wouldnt turn on, i knew it wasnt fryed cause i had Surge Protection and it didnt smell funky. So i started working on it trying to reset the Power Bar, un plugging and replugging stuff. Nothing seemed to work. So today i took the PSU out of my computer and start looking at it, all i saw was alot of dust. Didn't smell nothing but i dont know what the problem is. My computer just wont turn back on. Specs of PSU- 450W Echo Star I just need to know if i should buy another 450w or 500w PSU.