CPU : AMD Phenom 9750 Quad-Core Processor
RAM 4.0 GB
Video Card : ATI Radeon HD 4600 Series
resolution: 1920 x 1080
Thoughts ?
Your display is way over the top for a Radeon HD 4650, which is now only a Low End card. If you don't know what you have, it's surely past time to either learn or to replace it. An HD 4670 is not yet Low End. It is and was a great deal better than its little brother. But it's still not a High Resolution card, so unless you reduce that, Low Settings.
Meah, I would play Skyrim even on Low-Med. Stop beign sad if you're not playin' the game at Ultra settings

My pc :
2gb ram
Radeon HD 5570 Low profile
3.20ghz E6700
Hmm, can I play this at least on medium?

Didn't find my graph card on the list.
I'm sure it's there. It's not a "true" gaming card and isn't intended to be. It's a "Budget" card for gaming at lesser settings than a Mainline (Medium) card. I doubt it is powerful or fast enough for all settings at Medium at a Medium resolution, and no better than a mix of Low and Medium at High Resolution, but you didn't name any screen resolution yet.
Toshiba Satellite L655
Processor: AMD Turion II P540 Dual-Core Processor
CPU Speed: 2.4 GHz
RAM: 3.7 GB
OS: Windows 7 Home Premium (64 bit)
Video Card: ATI Mobility Radeon HD 4200 Series
Sound Card: Conexant SmartAudio HD
Please don't waste our time blathering about a site so worthless as SR Labs. They are wrong all of the time. This game will require an actual video card, which you don't have, but SR labs is just too stupid to know that.
It's already appeared two-three times in this thread. It started from here:
http://www.tomshardware.com/reviews/best-graphics-card-gaming-performance,3042-3.html
from where there was an on-page link to here
http://www.amazon.com/dp/B003ZMTPEW/ref=asc_df_B003ZMTPEW1768845?smid=ATVPDKIKX0DER&tag=pg-469-34-20&linkCode=asn&creative=395097&creativeASIN=B003ZMTPEW