A week ago I bought Lenovo E531 with Windows 8, but I don't like this operating system. I used to use Win XP. I downloaded Ubuntu 12.10, followed all the instruction how to create an bootable USB stick, but my laptop can't boot Ubuntu yet. Can You help me please!
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Since your laptop came with Windows 8, it probably has a feature called UEFI secure boot enabled, which can cause problems when installing Ubuntu. Follow the instructions here to disable UEFI secure boot:
Create a LiveDVD or LiveUSB of Ubuntu (>=12.04.2) 64bit.
In your BIOS, disable QuickBoot/FastBoot and Intel Smart Response Technology (SRT). If you have Windows8, also disable FastStartup.
Boot your PC using the LiveDVD or LiveUSB and choose "Try Ubuntu". If you get a Secure boot or signature error, you may wish to disable SecureBoot as described here, then retry to boot the disk.
Install Ubuntu from the Live CD/DVD or Live USB in the usual manner, then reboot the PC.
If the PC does not load Ubuntu (but instead loads Windows, for example, as in Bug #1050940), or if the Windows entry in the GRUB 2 menu does not boot Windows (see Bug #1024383), boot your PC using the Live CD/DVD or Live USB and choose "Try Ubuntu" once again. When the live session has loaded, run Boot-Repair (see link for details). When Boot-Repair loads, click on the "Recommended repair" button, and write on a paper the URL (paste.ubuntu.com/XXXXXX/) that will appear. Then reboot the pc. Do not run Boot-Repair unless you have problems booting the computer; the expression "if it ain't broke, don't fix it" applies to this tool.
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Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference. – Tim Aug 22 '14 at 19:29
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1@Tim quote from article added. – tlng5 Aug 22 '14 at 19:40