If I get a new PCI video card will the video on youtube and HD videos be smoother? I have an Atom processor?

tallest your an idiot ... that is a great complement to an atom processor as you do not want to over power your processor with your gpu (video card) if you want some real tech reviews on the card check out newegg's listing of it http://www.newegg.com/Product/Product.aspx?Item=N82E16814130592&Tpk=512-P3-1300-LR

Not really. Graphics cards and CPU's process data into a very high-res visual image on your screen, this is what takes up all their power and memory. Things like movies, youtube videos etc are pre-encoded packages of data that don't require anywhere near as much processing power.

No. You need to upgrade that CPU to at least a C2D, that is the problem. I find it hard to believe you built a PC with an Atom anyway, never heard of such things..lol.

You built your own system good for you. I like that initiative in a person that does something for his/her self Now you need to know the difference in what operating systems are good and what operating systems are bad. Here is 35 years of experience of computer building and systems operating systems. Windows is not the only operating system in the world, there are free far better superior operating systems available to you that you can download that are twice as fast stable and secure they don't crash, freeze up or slow down, they don't get windows viruses, and they are up to date. January 2012 People have bought Mac computers thinking they are the best money can buy, How wrong they are, they are no different from any other Intel systems, they all have the same Intel components inside.When it comes to Mac OS/x, Well you can have and run many different Mac like operating systems that are far superior on your Atom processor, go to this website and check out the latest Linux releases, then click on my name and send me a message and I will tell you which one will be best for your system http://distrowatch.com

My 6 yr old laptop that I sold to a 12 yr old girl has double the processing power as your Atom CPU. and Atom CPU's were made for windows XP not windows 7. Windows 7 is too heavy for a little baby atom processor. One guy suggested running Linux, I actually think that's a great idea for a slower CPU like yours plus it doesn't have as many issues as windows.