Originally Posted by
DrStiglit
It is understandable to be uncomfortable with the idea, but the PSU is really quit important and the only tool you need is a screwdriver. It sounds like a pretty solid system that could last you many years if you get a better PSU.
- - - Updated - - -
You can see the screws on the back of your PC.. They are where you plug it in. That is your PSU. Just unplug it, then you should see 4 screws around it and viola! There also really shouldn't be that many plugs. You don't need to unplug everything. There are some good PC building tutorials on youtube. It's intimidating, but once you do it you'll realize it's no harder than putting legos together and it's a skill that will be very helpful.