Windows 7 - Skyrim, Windows 95 Compability - Not full screen

Hey, I've just got Skyrim. It works only with Windows 95 compability mode. But then it's just in window and I can't do anything.

Please post you computers specs. Make sure the game and all your drivers are fully updated to the latest version. Really windows 95? this better not be some troll post.

I think you didn't understood me about the part "I can't do anything, I ment that I can't change it"

AMD Phenom II X4 N930
ATI Mobility Radeon HD 4250
3 GB DDR3 Memory

OS Name Microsoft Windows 7 Home Premium
Version 6.1.7601 Service Pack 1 Build 7601
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Manufacturer Acer
System Model Aspire 5552
System Type x64-based PC
Processor AMD Phenom(tm) II N930 Quad-Core Processor, 2000 Mhz, 4 Core(s), 4
BIOS Version/Date Acer V2.07, 30/12/2010
Hardware Abstraction Layer Version = "6.1.7601.17514"
Installed Physical Memory (RAM) 3.00 GB
Total Physical Memory 2.74 GB
Available Physical Memory 516 MB
Total Virtual Memory 5.49 GB
Available Virtual Memory 1.91 GB
Page File Space 2.74 GB

Have you tried changing the game settings? To a lower setting.

Lowest ones, but anyways the problem isn't that it works only with Windows 95 compability, but that When I turn that compability it's just in small window.

Well you shouldn't need to use compatibility in the first place. Skyrim is made mostly based on Windows 7 users. Or even Vista users.

Are you using any third party softwares like Steam?
Or do you have a retailer copy from the store?

Other then that have you tried to run the game as an Administrator?
Do you have the latests Graphic card drivers?
Have you tried to press Left Alt+Enter and see if you can gain the fullscreen mode that way?