各位好，
我的電腦是安裝win10，最近想要多裝個ubuntu。
上網爬過文，還是一直鬼打牆，希望經驗豐富的板友們能夠幫忙一下，謝謝！
首先，我在win10下，用電腦管理切割出一塊磁碟區
http://i.imgur.com/CMoY1cy.jpg（圖中198.28 GB那塊）
用USB開機以後，進入到了ubuntu的安裝畫面，
遇到了這個問題：
http://i.imgur.com/lwWD5Sb.jpg
顯示：
Force UEFI Installation?
This machine's firmware has started the installer in UEFI but it looks like
there may be existing operating systems already installed using "BIOS
compatibility mode" If you continue to install Debian in UEFI mode. it might
be difficult to reboot the machine into any BIOS mode operating systems later.
If you wish to install in UEFI mode and don't care about keeping the ability
to boot one of the existing systems, you have the option to force that here.
If you wish to keep the option to boot an existing operating system, you
should choose NOT to force UEFI installation here.
如果不管這個訊息，進到下個步驟：
http://i.imgur.com/VsneTqT.jpg
先前切割出來的空間，會顯示「不可使用」，
如果選擇安裝在那個空間的話，
就會出現：
http://i.imgur.com/o19QSQp.jpg
不知道我是哪裡出錯了呢？？
在這裡先感謝各位的幫忙！
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ps.windows的快速開啟選項有關閉
http://i.imgur.com/q0nQiFy.jpg
另外附上BIOS的設定：
http://i.imgur.com/lI8U5M4.jpg
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