Hello, I have Yosemite and also Windows 8.1 installed on a Macbook pro late 2013 15". Is there any chance that I might loose windows partion if I upgrade to El capitan? I don`t want to install windows again and all the programs and games on it. If you have any advices about what should I do before upgrading to el capitan please tell me (except time machine backups). Thanks in advance for your help!!