I have a dual-booted pc with windows 10 and ubuntu 14.04, which has been working just fine for a few months now. I noticed yesterday, however, that now when I restart my computer it boots straight to windows without showing me the grub menu. Secure boot is still disabled. I don't know if this is related to a windows update or what, but help in resolving the issue would be most welcome.
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I have installed Ubuntu 15.10 alongside Windows 10 with UEFI. To install Ubuntu, I chose the option install alongside Windows 10 or something similar to this. Then I created a new partition for Ubuntu and installed it. After installation, the boot menu did not show up. Initially I thought Ubuntu has not been installed, but when I plugged in the USB drive and wanted to install Ubuntu I saw an option of reinstalling Ubuntu on my machine. So, I found out that Ubuntu is installed. Pressing F8 and F12 also does not help. Can anyone help me bring up the GRUB boot menu? In Windows, I also entered the command bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi in cmd, but still the boot menu does not show up.  Reply (Himanshu) : Just boot in bios and, if you can, add boot option with name say ubuntu and path EFI/ubuntu/shimx64.efi. No need for live PCB or anything. Move the boot option to top. This is for dell GUI bios but I assume it works for all. Or you may want to see  or , where you can enable Windows Boot Loader for one boot or forever as you wish, and boot Ubuntu from it. If you want now, you can use the installed Ubuntu terminal to use the commands update-grub to use GRUB instead. (Not enough reputation to answer properly btw.)
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I have my encrypted Archlinux installed on my SSD. Now I have one HDD with Windows installed. But in my GRUB just Archlinux is shown (no Wonder, because I just installed Windows on the other HDD, GRUB doesn't know of that by now.).  My Question is, how do I properly add my Windows-HDD to GRUB, so that I can choose which to boot when starting?  I am a little bit afraid of destroying my GRUB so I can't boot my encrypted Archlinux anymore.  Thanks!
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On initial installation of Ubuntu 16.04, I checked off "Install third-party software" and, underneath it, I was prompted to check off another option which would allow the OS package to automatically disable secure boot on its own, a prerequisite of which was creating a password that would somehow allow this whole process to occur.  After continuing with the installation, I was never given any indication that this disabling of secure boot had occurred, nor was I ever prompted to enter the password that I had created.  Upon successful installation of the OS, I restarted my computer and checked out the BIOS. In BIOS, secure boot was still enabled. However, back in Ubuntu, I am able to seamlessly play MP3 and Flash files, which I assume indicates that the installation of third-party software was successful.  I haven't run into any problems as of yet (other than the fact that the UI has been a bit finicky and buggy at times), but I would like to know what on Earth I actually accomplished by creating that password.  What happened to the password I created? Will I need to remember it for any reason? It's not the same as my login/sudo password.  Has Ubuntu permanently edited my BIOS in order to make an exception for itself? If so, how can I view these changes and potentially undo them? Is that where the password would come in?  Why does Ubuntu need to disable/bypass secure boot to install the ubuntu-restricted-extras package anyway? Is my installation okay? Have I set myself up for future problems? Should I try reinstalling with secure boot manually disabled as not to receive that prompt in the first place?  Additional information: I am running a UEFI system, and I am dual-booting Ubuntu 16.04 alongside Windows 10.   Unlike this user, I do not receive a warning about "booting in insecure mode," but I would also like to know whether Ubuntu has created an exception for itself and how I could manage such exceptions. Unlike myself, this user has not mentioned anything about having to create a password.
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I have dual booted Ubuntu with Windows 7. I wanted to uninstall Ubuntu. So as per an answer for one of the related questions on this site I did the following:   Deleted the Ubuntu Partition through Windows. As per the answer now I was supposed to boot Windows from USB &amp; then do "repair startup".   But Windows could not find any problem hence nothing was done. So when my laptop booted normally (i.e. from HDD) it was showing some error like GRUB:/ unknown file system. I dont remember the exact words but it was something like this. Thus I couldn't boot windows neither Ubuntu. So again I had to install Ubuntu.  But now my question is how do I remove Ubuntu so that my laptop returns to the previous state of installing Ubuntu?  UPDATE: Seems that it wasnt on this site. My mistake :P .Here is the link
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I have two separate SSD's. One of them has Windows 10 Pro installed, and the other has Ubuntu 14.04.3 LTS.   When my computer boots I get no grub menu to choose the operating system I want to boot into, it directly boots into Ubuntu automatically. I can boot into windows with on problems when setting its SSD as the first one in the boot sequence in the BIOS.  I have a third 2TB HDD that I use only for storage. Here is the information summary after running bootinfoscript  ============================= Boot Info Summary: ===============================   =&gt; Windows is installed in the MBR of /dev/sda.  =&gt; Windows is installed in the MBR of /dev/sdb.  =&gt; Grub2 (v1.99) is installed in the MBR of /dev/sdc and looks at sector 1 of      the same hard drive for core.img. core.img is at this location and looks      in partition 112 for .  sda1: __________________________________________________________________________      File system:       ntfs     Boot sector type:  Windows Vista/7: NTFS     Boot sector info:  No errors found in the Boot Parameter Block.     Operating System:       Boot files:        /bootmgr /Boot/BCD  sda2: __________________________________________________________________________      File system:       ntfs     Boot sector type:  Windows Vista/7: NTFS     Boot sector info:  No errors found in the Boot Parameter Block.     Operating System:       Boot files:        /Windows/System32/winload.exe  sda3: __________________________________________________________________________      File system:       ntfs     Boot sector type:  Windows Vista/7: NTFS     Boot sector info:  No errors found in the Boot Parameter Block.     Operating System:       Boot files:          sdb1: __________________________________________________________________________      File system:       ext4     Boot sector type:  -     Boot sector info:      Operating System:  Ubuntu 14.04.3 LTS     Boot files:        /boot/grub/grub.cfg /etc/fstab  sdb2: __________________________________________________________________________      File system:       swap     Boot sector type:  -     Boot sector info:   sdb3: __________________________________________________________________________      File system:       vfat     Boot sector type:  FAT32     Boot sector info:  No errors found in the Boot Parameter Block.     Operating System:       Boot files:        /efi/ubuntu/grubx64.efi /efi/ubuntu/MokManager.efi                         /efi/ubuntu/shimx64.efi  sdb4: __________________________________________________________________________      File system:       ext4     Boot sector type:  -     Boot sector info:      Operating System:       Boot files:          sdc1: __________________________________________________________________________      File system:       ntfs     Boot sector type:  Windows Vista/7: NTFS     Boot sector info:  No errors found in the Boot Parameter Block.     Operating System:       Boot files:         I have installed Linux before many times, however this is my first time installing it on a separate drive. Do I need to do anything extra/different seeing that is is installed on a separate drive to Windows?
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I'm having a lot of issues dual booting Windows 10 and Ubuntu 14.04. I'd like to not do anything too crazy if possible.  I need to install Windows 10, when I already have Ubuntu 14.04 installed. My Laptop is a Dell.  OK, here's what I need help with:   Downloading everything I need Making my live USB's Split partitions Installing Windows 10 Repairing Grub Fixing the UEFI to boot Grub
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I have dual booted Windows 10 and Ubuntu 16.04 in UEFI mode (secure boot off). My time in BIOS is correct.  When I boot into Ubuntu and then boot into Windows 10, it shows the wrong time. I have to correct it manually or by the internet in Windows 10, and when I reboot into Windows 10 then it is not a problem. The clock will show the correct time. And then when I reboot to Linux the clock is correct, but switching back to Windows 10 the clock messes up again.
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I'm very new to Ubuntu, and have come to this point that I can't boot back to my Windows Vista anymore.  I thought that I would get some kind of dual boot in the beginning when booting my computer, but this doesn't seem too happen and I don't have the slightest idea on how to fix this. I was looking for help here at askubuntu, but I couldn't seem to find anything. I'm too new with this software.  I'll need hints and tips on how to fix this  Thanks for your time folks!
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I followed this  to install Ubuntu as dual-boot with Windows 8.1 pre-installed as(UEFI),but I am not able to dual-boot and tried    I first burned an Ubuntu ISO on a blank DVD-R to create the LiveCD. Even with secure boot disabled, when I tried restarting my computer, it never booted to the installation screen, and it just skipped to Windows.  After a lot of skimming, I thought I had to put my computer in Legacy Mode in order to get give my CD/ROM drive priority. I installed Ubuntu and used my existing EFI partition. Ubuntu works, but Windows doesn't, probably because my laptop is stuck in Legacy Mode. I tried switching back to UEFI using boot-repair on the Linux Terminal, and going into Advanced Properties -> Grub Location -> Ticking the checkbox for EFI, but it says I need to be in an EFI session, and now I'm just really lost and confused at what I've all done. I can see my Windows8.1 OS on a partition but I want to dual-boot Windows 8.1 along with Ubuntu?   Did I just brick my computer?
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Is there a way I can password protect grub menu entry- e.g. if I dual boot with Windows 7 can I set it so that a password is needed to boot into Win 7?   Secondly I would also like to protect grub menu entries being changed if possible.  thanks
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I just installed Ubuntu alongside to Windows 7, and now Windows 7 will not boot.  When the system starts, it shows me entry for Windows 7 in the boot menu, when I click on the Windows 7 option in the boot menu, after few seconds it will show me the boot menu again and Windows will not boot. It shows me no error message. Windows 7 option is available in the boot menu but it just does not boot.  Here are my boot info results   update - 30/01/2012 I tried windows recovery - fix startup issues - that showed no problems but issues were not resolved  Then I tried the widnows recovery console and run following commands  bootrec /fixboot bootrec/ fixmbr bootrec /RebuildBCD   But that does not help, Now neither ubuntu nor windows will boot. When I boot from windows CD it shows me a valid windows installation in c:\ drive.  update After a lot of help I got from #ubuntu channel and trying out different things, ultimately I can now boot both windows and ubuntu, still, the issue is not completely resolved though.  Here's what made it work  Boot using ubuntu live CD and then run the testdisk utility as steps mentioned  Restart system and I was able to see the boot menu and boot into Ubuntu, then put the following code in boot/grub/custom.cfg. Restart and now I can see one more entry to boot win7, clicking on it boots windows.  menuentry "Windows 7 (loader) with grub ntldr workaround" --class windows --class os   {     insmod part_msdos     insmod ntfs     set root='(hd0,msdos1)'     search --no-floppy --fs-uuid --set=root FAF0F57DF0F54085     ntldr /bootmgr }   It will make windows boot probably but now windows have a dependency on Ubuntu and I can not remove Ubuntu or else windows will stop working.  Credit goes to 'Jordan_U' on #ubuntu channel.   update Here are the win7 boot details I got from EasyBCD  Windows Boot Manager -------------------- identifier              {9dea862c-5cdd-4e70-acc1-f32b344d4795} device                  partition=C: path                    \bootmgr description             Windows Boot Manager locale                  en-US default                 {04fe8f95-4b17-11e1-a45c-909d3d25f938} displayorder            {04fe8f95-4b17-11e1-a45c-909d3d25f938} timeout                 30  Windows Boot Loader ------------------- identifier              {04fe8f95-4b17-11e1-a45c-909d3d25f938} device                  partition=C: path                    \Windows\system32\winload.exe description             Windows 7 Home Premium locale                  en-US osdevice                partition=C: systemroot              \Windows resumeobject            {8d25a443-4b0a-11e1-a835-806e6f6e6963}   Note Still, I am looking for how can I have everything clean and how can I boot windows without having a dependency on Ubuntu. so that if ever I have to remove ubuntu, windows will keep booting file without ubuntu.
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I went ahead and installed windows 10 on my windows 8 and Ubuntu dual boot PC. All went smooth and Windows 10 works perfectly however the computer automatically boots to Windows and the grub launcher is missing. The partitions are still there I just need some help getting Ubuntu back. Thank you in advance!   Edit: I found a way around it. I don't know of this works for everyone but I went in to the control panel and went to update and recovery. Then I went to recovery and booted into uefi.  Then I selected boot from device and my Ubuntu partition was there and I could boot into it.  Feel free to post other solutions though!
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I installed Ubuntu in the dual-boot configuration so that I can still boot up in Windows. But I just want to get Windows off of the machine.  Anyone know how to do this without having to go through another Ubuntu install? Also are all of the Ubuntu updates safe to take? Does Ubuntu have restore points in case something goes haywire from the updates?
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I have installed Ubuntu 20.04 alongside Windows. When I boot the system, it shows the grub menu for 10 seconds to choose between Ubuntu and Windows. I don't want that menu, just want to boot it up right after pressing the power button. I have looked into  thread and added GRUB_HIDDEN_TIMEOUT_QUIET=true  and even changed GRUB_TIMEOUT to 0 and then ran sudo update-grub. But it didn't work, menu is still being shown at boot time. This is my /etc/default/grub file-   # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: #   info -f grub -n 'Simple configuration'  GRUB_DEFAULT=0 GRUB_TIMEOUT_STYLE=hidden GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=0 GRUB_DISTRIBUTOR=`lsb_release -i -s 2&gt; /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" GRUB_CMDLINE_LINUX=""  # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"  # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console  # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE=640x480  # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true  # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true"  # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1"   How do I disable it?
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I am just about to install Ubuntu alongside Windows, just need to make sure I know how to remove it later.  I know from past the major problem was when I removed Ubuntu, I either still got into the GRUB booting menu, or I couldn't boot at all, and had to format HDD and start over. Now I found an article practically saying the Windows loader should be back upon deleting Linux partition, so I want to make sure:  If I have Windows and Ubuntu dualboot, and I want to get back to Windows booting quickly itself without choosing from any booting menu, is it enough to just delete the Ubuntu partition? Will the Windows loader override GRUB?  Thanks!
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I've just upgraded to Windows 10 from Windows 8.1 on my partitioned laptop that has Ubuntu 14.04 installed. Grub no longer appeared on boot so I ran boot-repair from an Ubuntu liveUSB. This didn't seem to have any effect. I've checked and secure boot is still disabled. Log from boot-repair:  So what's next?  Update: I've attempted to use chroot to update grub from my Ubuntu partition. update-grub runs successfully finding both linux and windows boot manager but the process still doesn't have any effect. grub-install complains that it cannot find EFI directory (but I have mounted everything correctly).  Update2: Just discovered that running efibootmgr after chroot into ubuntu shows ubuntu as not being in the boot order at all. I manually changed the order and rebooted to discover that the bootorder was reset. I run in windows: bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi But this has no effect either even after reporting 'Operation Successful'.
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I've installed Ubuntu 16.04 LTS along side with Windows 10 (I shrinked my Disk using Windows Disk Management) on my Acer laptop (ES1-531-C13G), but when I restart/reboot my system no menu (Grub screen) appears from where I can select the operating system that I want to boot with, but instead, system takes me into Windows 10 everytime. I've tried several things from internet including :    Ran bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi from windows command prompt.  Reset  Bootorder i.e. first Ubuntu then Windows from Ubuntu terminal (after successful Ubuntu installation) etc, but nothing works for me so far. Please guide me !