Take the 2-minute tour ×  How to uninstall the Grub and restore
the Windows 8 system with secure boot and UEFI?  share|improve
this question Well, "Secure Boot" is more like a "Restricted
Boot", see this. I don't know why you'd want to restore a
feature that threatens your freedom. –  jmendeth Jan 11 '13 at
16:34 Also, this could (or not) be seen off-topic here. – 
jmendeth Jan 11 '13 at 16:34 @jmendeth Im trying to experiment a
new way to install Linux with it. So i need to restore the
original settings first. –  EApubs Jan 11 '13 at 16:39 add
comment  6 Answers  I recommend the following:    1. Boot from
an emergency system (Ubuntu in "live CD" mode, PartedMagic,
System Rescue CD, or whatever).   2. Mount your EFI System
Partition (ESP). This is often (but not always) /dev/sda1. It's
always a FAT32 partition that has its "boot flag" set (in parted
terminology) or a partition type code of EF00 (in gdisk
terminology).   3. Launch a shell and change to the ESP.   4.
Type sudo rm -rf EFI/ubuntu. (You can omit s