Start in your control panel, click here
Next if the English is not showing up like it is here, click to add a new language, scroll to English and add it.
Next, click on the options here
Click here to add the OS language pack
I think it makes you reboot your computer now.
Once you are back in, go back to control panel, there is one more step.
Click here to make English the OS primary language
You will need to log out and back in now.
Post and let me know if this works for you, I may have gotten the order wrong, but I believe that was it. Good luck!