Changing Computer's Language

How2change my computer's language to English?

I manged to get my keyboard to EN, but it's not advantage for me since I'm used to the PT keyboard. I want the system langauge such as right click button and etc set to English. A friend of mine said he some kind of program to change his computer to Spanish, but he doesn't remember what program he did.

Thank you in advance! ^.^

#Edit: Windows 7

 

http://windows.microsoft.com/en-US/windows-vista/Change-the-display-language

 

I've done that and nothing happened but the fact my keyboard was set to EN. t.t Even after I restarting the computer, it was still in PT and the keyboard was in EN. ç.ç
Oh, sowwy, Operating System is Windows Seveeeeen.

 

Unfortunately, you need to have Windows 7 Ultimate edition in order to change the system language. If you do have Windows 7 Ultimate edition, then scroll down to TrekDozer's post for instructions.

 

Unless you reinstall your computer software, I think that'll work.