Hi, Could someone please tell me what the difference, if any, there are between installing an original English version of Windows 7 (or 8 for that matter) and installing an English Language Pack through Windows Update? So far, I just understand that I need either an Ultimate or Enterprise version of Windows 7 to do this on W7 or any version for W8. Are there any fundamental differences in looks, performance or usability between ordering an English OS and just installing the Language Pack? Buying a computer in Germany but would much prefer an English OS! Thanks!