PC problems

hi my name is Nick, and im having a problem with my PC. It keeps blue screening saying memory dump files. sometimes it wont even turn on. i will turn it on and it will not give me a feed or a signal from the box to the screen. i have a 400 watt battery and an asus graphics card. i play on a 40inch tv. i bought my PC from best buy about 2 years ago for $1000 and im tired of having problems with it. geek squad said they would come over and take a look at it for $169 but first i wanted to know if you guys know an easier way to fix the problem. please help me!!

A bit more info might be helpful,like what are you running ? XP, Vista, what window? Also what AV’s do you have on and what where you using before.Have you run malwarebytes and avast.what other programs are you using.