Building a PC is not that tricky, it is installing windows and configuring the PC that is the hard part
The best way to start is to choose your components, try to make sure they seem pretty compatible. Unfortunately, I have never really seen one website that contains everything, it usually involves trawling around.
I would read reviews and look for a good stable motherboard like an ASUS or Abit. I do recommend sticking to brandname products for memory, graphics cards, Hard disks etc.
The only way to do it is to choose some components and research them. Putting them together is easy as you will find that stuff only slots in one hole
The basic components you will need (and the ones you should spend your budget) in order are :-
Mouse and Keyboard
This should get your PC up and running. CPU and Hard Disk I rate as low as these are the prices that fluctuate the most, they are constantly decreasing faster than the other components.
its actualy very easy to build one
i take it you know how to install drivers and wher to get them from so you should be ok installing the windows
the bit people seem to get stuck on is the jumper settings on the hdd and cdroms. just remember when you put 2 devices on one cable, one has to be set to master and the other to slave (see manual of device for whereabouts)
the bios will be fine too, set it to auto detect and all will be ok.
i remember back when mobos didnt support auto detect, that was frustrating because i was building 3 pcs a day in my job and couldnt afford to make mistakes lol
it seems building one is easy, just each of us have our own little problems lol
you will find it easy too and you will come accross a problem of your own, when you get there post here and we will help you out
I used Scan when I built my machine. I pieced together my order on the website, then call in the order. I don't know if it's typical, but I got a guy who really knew what he was talking about on the other end, and he confirmed that all the stuff I was buying would work together and even made a few helpful suggestions.