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I use a Sony Vaio SVF14212 with windows 8 pre-installed. I removed Windows 8 and installed windows 8.1.

I just installed ubuntu 14.04 LTS(I want to have dual boot ubuntu-windows), but when it restarted, it always boot windows 8.1 directly without 'show' option to choose OS. What should I do?

Dooley_labs
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  • Please try http://askubuntu.com/questions/226061/how-to-install-the-boot-repair-tool-in-an-ubuntu-live-disc – Mark Kirby Oct 06 '15 at 12:44
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    Welcome to Ask Ubuntu! ;-) Are you running UEFI or BIOS boot? (If you don't know, boot an Ubuntu LiveDVD, choose Try Ubuntu, run gparted and post a screen shot of that.) [edit] your answer to reflect this additional information and then drop me a note @Fabby. – Fabby Oct 07 '15 at 18:18

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You need to go to the BIOS and change the boot order. Ubuntu probably installed a boot manager if everything went well.

I'm not sure what the key is in Sony's laptops, but you must press one of the F1-F12 keys when the Vaio logo appears when you start up your computer.