Startup problem with Ubuntu/windows8.1

So I installed Ubuntu last night and I have gnu grub 2.02~beta2-9ubuntu1.6 my laptop is в Toshiba with core i3 processor and it 8.1 - windows or had windows, when или get to the start up screen it - the Ubuntu and it - the windows boot менеджер (on/Dev/sda2) path when I click on the windows one it says/EndEntire and just won't похвалите up but the Ubuntu one works умер how хан I get both startups to work any answeres??

I need the windows to work becuase of some games I acquired I just want windows so эксперт to avoid buying the games again