Keyboard reset and changed the keys usual fun

Hello,
Could someone help me please.. i own an acer extensa 5620G and it was a gift from abroad..I had my laptop reformatted and suddenly the keyboard keys was re arranged i just need to know what country should i choose when i have 2 w/ @ and " symbol....my 7 consist / { and the problem is i don/t know the right selection to the keyboard options,,would it be US or something,,,