http://www.sezob.cz/navody/win7_oprava_mbr.html
http://windows.microsoft.com/cs-cz/windows/startup-repair-faq#1TC=windows-7
https://support.microsoft.com/en-us/kb/927392
http://www.howtogeek.com/howto/32523/how-to-manually-repair-windows-7-boot-loader-problems/
http://www.tomshardware.com/news/win7-windows-7-mbr,10036.html
https://neosmart.net/wiki/recovering-windows-bootloader/