The hardware and software you put into your computer depends on what you are
wanting it for. A gamer (like myself) goes to alot of
LAN Parties and excels @ Call of Duty 3,
for example. A quality gamer will want to
get a top of the line graphics card and monitor. PC building
takes much planning of which hardware/software to use going forward, coupled with configuration
options is limitless. The cost is a limiting factor for alot of people because you can put
thousands of denaro$ into one computer or you can put together an $800 machine.
I usually buy my parts online at Price Grabber or New egg .
shopping for price can be time consuming but the more you shop the more
you get the hang of who is high denaro$ and who is low denaro$ on their parts.
The operating system has to be installed after you put the parts in place.
The main players are Microsoft , RHEL and their are other OS's.
After installing an OS with upadates , your finished.
you have your first build under your belt.
Don't forget to pen test your whole network!