If that dosent work tray this:
Type cmd into the Start menu search box and run as administrator
just run following commands
bcdboot %WinDir% /l en-US
Change the en-US to the language version of the installed Windows 7, such as ja-JP, de-DE, es-ES, pt-BR, zh-CN, zh-TW, fr-FR, fi-FI and etc.
and restart