Thanks for replying, and for the advice, for i always thought that CPU would be sufficient...but then again, i don't know much about them.
And yes, one of my major problems is that i don't own a copy of windows 7. I was thinking of Ubuntu, or one of those Linux-based systems, but really, no-one makes games for those systems. I have a copy of windows XP professional, but that's getting old too...
My dad also advised me that the Geforce 550 is way more than i need and i perhaps need to think through my choice again and update the list of components. Also, i forgot to mention in my previous post that i can't get anything outside of the UK, and i need to keep costs as low as possible while maintaining the decency of the components. I'm looking for cheaper things still, and if you have something in mind perhaps you could suggest it.
Will get you a list as soon as I can. Am just finishing a chassis swap on one of my computers at the moment.
My video games are setting themselves to low or the lowest graphical settings possible the first time I run them. Are they not recognizing my system or something?
Actually under "Performance Information and Tools" in my control panel the computer gives me a base score of 5.9 based on my hard drive only, even though the second lowest component is my processor at a score of 7.6 out of 7.9 . Are my games reading my base score and deciding what graphics settings to use based on that?
It always happens for me, except on source games, even though I have one of the fastest consumer computers out there.
Source games are some of the only ones out there that I find actually take your hardware into account.
http://www.falcon-nw.com/
A site that I found to have very VERY VERY VERY VEEEEEEERRRRYYYYYYYY.....er.. .nice... products.
Just thought that maybe Ethan might like to look at it. (He probably already knows about it <_>)
As Reactor Worker once said, the only hands I'd trust to build my computer apart from my own, are Falcon NorthWest's.

What is wrong with my video card?
1. That site is incredibly bad at recommendations. It's nearly always wrong.
2. The core of your GPU isn't the best. It's an integrated Intel one, which are really quite bad, apart from the last few ones.
3. What is the exact model of your GPU? Start > Run > dxdiag, and post a screenshot of the display tab.
I did a hard drive transplant from my grandmas old computer to a newer, hard-driveless one. It boots in safemode but when booting normal it just arruptly restarts with no warning while showing the Winsows XP loading screen.
I noticed that it will show a Dell bios after the normal E-Machines bios which I found odd.
Sounds like a driver issue. I believe that Windows just install the drivers that it needs. Have you tried reinstalling windows while the hard drive is in that computer?