Ubuntu Installation :: Grub Not Recognizing Windows 7 / Why Is So?
Jan 29, 2011
Background: I dual boot Ubuntu 10.10 and Windows 7. I use an HP laptop.
So here's the deal. My Windows 7 partition got a virus a few weeks back. So, I removed the partition and replaced that partition with a squeaky clean version of Windows 7. Then, since Windows had installed, I could not get grub to work. So I booted up my disk and installed a third partition, which was a second Ubuntu partition, which I plan on deleting. I did this so I could get grub back. Now I have grub back but no Windows. I can mount Windows from both partitions. Then, I modified the /boot/grub/grub.cfg file to add windows. It showed up in grub but when I booted into it, it says "bootmgr not found." I also did an update on grub and that didn't work. I want to be able to boot into that windows partition.
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Mar 24, 2015
I've set up a dual boot system with Debian and Windows 8, both installed on their own drive, with their own boot partition. I installed eveything in UEFI-Mode with fast- and secure boot turned off. Both installations are working, as I can access them by changing the boot priority in the Bios. What I cannot achieve is to let grub boot my windows installation.
This is the output of parted -l:
Code: Select allModel: ATA Samsung SSD 840 (scsi)
Disk /dev/sda: 128GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 1049kB 512MB 511MB fat32 boot
2 512MB 111GB 111GB ext4
3 111GB 128GB 17,0GB linux-swap(v1)
[Code] ....
As you can see, my linux install is on sda, my windows install on sdc (sdb beeing a data disk). This is the entry I made in the 40_custom file in etc/grub.d:
Code: Select allmenuentry "Windows 8.1" {
insmod part_gpt
insmod chain
set root='(hd2,gpt2)'
chainloader /EFI/Microsoft/Boot/bootmgfw.efi
boot
}
I think this should be fine, but if I choose the windows entry wehen grub is booting, it says: error: no such partition. It's my first debian installation, and I am stuck here. Not too much of Linux experience in general.
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Apr 8, 2011
I have installed windows after installing debian. Whenever, I start the system, I dont get debian instead I get only windows.
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Jan 9, 2011
I installed Ubuntu this morning alongside Windows 7, but update-grub doesn't seem to be recognizing the Windows partitionI've attached bootinfoscript's RESULTS.txt, any ideas?
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Apr 22, 2010
installed windows 7..then tried restoring grub using live cd....mounted partition somewhere else....then installed ubuntu again where it was installed previously and now grub is not detecting windows 7 but i am able use my windows files
used sudo update-grub2.
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May 24, 2010
I do not know what to do, i cannot load windows partition. it just loads grub again. this must have been something that happened when i upgraded to the 10.04 or w/e. can someoen help me out with what i can do to stop this or fix it. maybe i can reinstall but i want to know what will work first, i do not have a lot of time to fool with my computer like this again. i spent a week getting ubuntu on my computer the first time so i do not ever want to spend that much time again especially in finals week. !
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Jun 10, 2010
I've previously installed ubuntu using wubi. But this is the first time I've tried installing it directly on the hard drive. I bought a new 320 gig hard disk and divided into 3 partitions of 50gig for windows 7, 30 gig for ubuntu and and the remaining for data. I installed windows 7 on the 50 gig partition. When I tried to install ubuntu using usb boot device, it says no operating system found and all my hard disk is muddled up and I can't see my partitions.
Now I go into live cd mode and see if I can mount my partitions and there I can see all the partitions. I formatted the 30 gig partition which was previously in NTFS to FAT32 and tried to install ubuntu directly from the live cd into the 30gig partition. But still the installer cannot see either my partitions nor my windows 7.As of now I'm using VMplayer and running ubuntu on a virtual machine. But would really prefer to have it installed on the hard drive to derive its full power.
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Oct 7, 2010
I am actually facing a vague problem here. I was previously running Windows XP and Ubuntu . Ubuntu was installed Windows XP The problem is
1. First I tried to do some disk partitioning. That ended up with some error.
2. Ignoring that, I went to install Windows 7 over Windows XP but I was not able to proceed with Windows 7 , because the partitions were corrupted.
3. So I used Ubuntu LIVE CD (Grub was lost at this point )and used 'testdisk' and recovered the partitions.
4. Now installed the Windows 7 successfully.
5. Now again I moved to Ubuntu Live CD to write the GRUB. After which I tried restarting
6. Now Ubuntu is booting perfectly as before. But the problem is with Windows
7. The GRUB loader instead of showing Windows 7, it shows Windows XP !!! . and there is no other entry for windows. When I tried opening it, it says "error, cant read file" and further inout moves back to the grub loader list again.
"How do I change the entry to Windows 7 from Windows XP and boot Windows7 successfully " I tried it a couple of times, same thing happens . So how to change the entry?
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May 7, 2010
I had 9.10 installed and I did an upgrade to 10.04. However I cannot see anymore my Windows Vista partition with grub.. I have a Toshiba laptop Satellite p305.This is my boot script output:
Boot Info Script 0.55 dated February 15th, 2010
============================= Boot Info Summary: ==============================
=> Grub 2 is installed in the MBR of /dev/sda and looks on the same drive in [code].......
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Mar 5, 2011
how to be able to add windows 7 to my grub menu or to even be able to boot to windows 7. I am currently unable to do it and my system just automatically goes straight to ubuntu. I've tried holding down SHIFT during startup and all that appears in my list is ubuntu entries and a memtest entry. My windows 7 files are still intact because I can see the drive through ubuntu and see all my files. I am trying to have Windows 7 on one hard disk that is 640GB and ubuntu on a second hard disk that is 160GB
[Code]...
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Aug 5, 2011
Ive been running windows 7/Ubuntu dualboot for some years now and never had any problems.Some months ago I got a new Patriot Inferno ssd. Ofc the first thing I did was to installl windows 7, it had no problems, ran fast and smooth. Then when I reinstalled grub I started to get error when trying to start windows, the logo never apeared and all I got was the message "Windows failed to start. A recent hardware or software"Status: 0x00.00F" "Info: The boot selection failed because a required device was inaccessible.". It does not matter what order I install windows and ubuntu in, or how many times Ive tried to reinstall grub. Windows 7 will not work while I have grub/windows installed. Right now Ive got them installed on separate drives, ubuntu on the ssd and windows on a partition on a 1tb hdd. Unfortunately I need to have windows for .net programing and gaming..
[Code]...
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Feb 22, 2010
i've been using ubuntu with wubi, and I'd like to install it on my new hard drive (so windows is on one hdd and ubuntu is on another). afaik, grub will be installed on the hdd w/ ubuntu, and i have to set it to recognize the other (windows) hdd. assuming that i want to get rid of ubuntu and just use windows, what steps do I have to take to do so? (if grub is only on the ubuntu hdd, then would I just have to format it?)
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Oct 31, 2010
i just downloaded Ubuntu 10.10 onto a USB key and am attempting to instsll it next to Windows XP. The Ubuntu install wizard has giot to the point where i have already chosen my language and asked it to install upgrades as well, when i click "Foward" it only displays two options:
1) Erase and use entire disk
2) Specify partition manually
It is supossed to give the option to "Install along side other operating systems". This option is not being shown -si what do i do?
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Mar 11, 2011
I am trying to install a fresh install of Ubuntu 10.10, but I am finding it is not recognising my only HDD in the machine. It is working because I am running Windows 7 x64 on it.
Here are my machine specs:
CPU: AMD Athlon 64 X2 5600+
Motherboard: XFX MI-A78U-8309 GeForce 8300
Graphics Card: NVIDIA GeForce 8300 + 8400
HDD: WDC WD5001AALS-00L3B2 ATA (~415GB)
The installation knows when my IDE drive is plugged in, but I want to install the boot sector in the WDC drive.
WUBI also fails to install on this current drive, though can setup the boot sector OK.
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Feb 5, 2010
My laptop got broken so I extracted my hard drive to use as an external. The problem is the computer I am using has windows xp on it and my external has also a windows xp, ubuntu and kubuntu. I need to have the xp from my external running because i use it for .net development. How I can have 2 windows on grub with root (h0,0) and (h1,0). My ubuntu is (h1,6) and kubuntu is (h1,3).
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Mar 8, 2010
I've been dual booting for years now between XP and Ubuntu Dapper -> My computer has a number of hard drives but on the main Hard Drive I have a Windows 7 partition and a Ubuntu Partition and a Swap partition.I've installed Karmic on it's partition twice now, I know the disc is fine because I have checked it for errors and installed it on other computers.
I have tried setting up the Boot Loader from Windows 7, but this yields a message "Cannot load from harddisk". GRUB doesn't install what so ever.Do I need to specify where GRUB gets installed as Windows 7 uses a different Boot Loader? Is this a Karmic / Windows 7 / Hardware bug?
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Nov 1, 2010
After I installed lubuntu Windows XP is not showing up as an option in GRUB (boot menu).Only lubuntu and memory test.Windows partition is there and untouched, because when I run G Parted I see it, and it is the same size as before, and still flagged as 'boot'I tried running my XP-OS-CD in repair and the repair CD sees and identifies the Windows OS, and I can gain admin rights, but I don't know the commands (within CD) to repair the boot menu so windows XP is an option when booting up.
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Nov 6, 2010
first i partitioned my hdd into two partitions and then i installed windows 7 on the second partition all went fine so i decided to install Linux on the first partition installation went fine but after that GRUB could not boot windows 7.
Code:
Disk /dev/sda: 203.9 GB, 203928109056 bytes 255 heads, 63 sectors/track, 24792 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x05d67c23 Device Boot Start End Blocks Id System /dev/sda1 1 12748 102398278+ 5 Extended /dev/sda2 12749 18770 48371715 7 HPFS/NTFS /dev/sda5 1 12224 98189217 83 Linux /dev/sda6 12225 12748 4208998+ 82 Linux swap / Solaris
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Jun 21, 2010
I am trying the 10.4 version from last months APC DVD (I have used 8.4 (liked it) and 9.4 (failed to install) and I am trying to install it on my spare rig to see how it all goes.
System Specs:
Intel E6850 @Stock Speeds (normally OC'd to 3.2GHz)
G.Skill 2GIG DDR2 800Mhz RAM
WD500GIG SATAII Green HDD
Gigabyte P35 Motherboard (latest Bios)
Nvidia 9600GT Palit Sonic GPU
I boot disc from post, goes through the 1st 3 steps, select time zone etc and it wont find my HDD but it will find my USB mem stick when its plugged in.
I will keep fiddling in the bios to make sure that I have everything correct (it works fine when I installed w7 about 2 hours earlier)
I am installing it without dramas on a old P4 1.6GHz s478, 512mb Ram, 40GIG IDE and a old Geforce MX460 GPU and its at 53% so I know that the disc / version is good.
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Jul 23, 2011
This is partly a note to myself for the future and a guide to anyone who experiences similar issues.
So, I had to reinstall Windows XP since my previous installation gave me a blue screen error due to reasons unfathomable. Naturally, this deleted the GNU Grub and I could not login to my Fedora.
I read that apparently booting from a DVD installation offers an option to enter the rescue mode. I did not have a DVD, I only had the LiveCD so I had to figure out a way to reinstall Grub from the LiveCD. The following method seemed to do the trick.
Run the LiveCD and open Terminal.
1. Find the partition where the Grub Stage1 is code...
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Jan 7, 2010
I installed a dual boot system by installing Win7 and then Ubuntu 9.1. All fine until I needed to reinstall Win7. Now Windows has made itself the only OS. I presume that it has supperceided the GRUB. How (where) can I put the Grub back - (bearing in mind that the only way to run Ubuntu is to run it fron CD)?
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Apr 18, 2010
I recently had to reinstall Windows XP and as usual it destroyed my grub setup. I have done this before, so I simply booted from a live CD and typed this in the terminal:
Code:
sudo grub
> root (hd0,2)
> setup(hd0)
> quit
Now, the problem with it this time is that in the past in these situations I had only Ubuntu Feisty and Windows XP installed on my machine. But I have installed Ubuntu 9.04 on a separate partition (retaining the old 7.04 installation separately) since I last had to reinstall XP. Doing the above procedure restores my grub sttings to my pre-9.04 installation (i.e. I only get Ubuntu 7.04 and Windows XP in the grub menu).
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May 11, 2010
i did a fresh install of 10.04 on my asus 1005ha netbook (first-gen 1005ha, if it matters), and it works great. However, grub does NOT detect my windows partition. In gparted, the partition is recognized as "unknown". I can't mount it in ubuntu.
This is what fdisk gives me:
WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
[Code].....
My windows 7 is not corrupted. it is also not virus-infected. I know what i am doing, and i know my windows is fine. it has been running fine prior to installing ubuntu. I'm just saying this becuz i noticed that viruses are a common response to similar problems like this.
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Aug 3, 2010
I'm new to the world of dual booting Ubuntu. My computer is currently running windows 7 64-bit, and I'm trying to install Ubuntu 32-bit to run beside it. So I've created a boot disk, and I try to install Ubuntu. The weird thing is when I get to the frame that says "Prepare disk space" it correctly shows that I have windows 7 on the computer, but it shows it's on the wrong drive. In fact within the Ubuntu installer it doesn't even show the physical drive that windows is on, it only find the other two drives. If I load up System > Administration > Disk Utility then I can see all 3 physical hard drives and all the partitions on them, but not under the Ubuntu installer.
So I tried installing Ubuntu onto one of the other physical hard drives and that seemed to go just fine. The only problem is now when I boot, the only way I can swap operating systems is to go into my BIOS and change the boot order of my hard drives. If the hard drive with Windows is higher in the boot priority, it will boot windows, no problem. If the hard drive with Ubuntu on it is higher, then it takes me to grub, where it correctly shows windows 7 and ubuntu. Only problem is when I choose windows 7 all I get is a blinking cursor and nothing happens.
If I choose Ubunutu it boots correctly and everything works. So in a way I do kind of have them both working, but it'd be nice not to have to go into my BIOS just to change operating systems. I'm guessing that grub's problem is that the Ubuntu installer identifies the wrong drive that Windows is installed on, so when I pick Windows from grub it goes to the wrong drive. Can I fix grub manually? Or is there some compatibility issue between Windows 7 64-bit and Ubuntu 32-bit that is causing this conflict?
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Sep 4, 2010
i had a dual boot xp/ubuntu first. later i had to format and reinstall xp. this deleted the grub bootloaderplease let me know, how to fix this! please make it simple . i have the live cd, but i don't have internet connectivity in ubuntu.
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Dec 13, 2010
Every other guide I've seen is confusing the heck outta me.
I had ubuntu, and no other OS, then I installed win7, and now I want GRUB to be my MBR.
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Dec 29, 2010
I had Windows XP installed on my PC then bought a new HDD, installed Windows 7 & Ubuntu 10.10 in dual boot, later I added the Windows XP HDD as an external USB then typed "update-grub".
At boot up the drive appears at the bottom of the GRUB menu but when I select Windows XP it gets as far as the XP splash screen, after a few seconds there is a flash of blue screen with some writing on it then the PC re-boots. Here is grub.cfg:
Code:
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
[Code].....
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Apr 12, 2011
I just did a fresh install of Windows XP Home Edition and then a fresh install of Ubuntu 10.10. I can't get Grub2 to find the Windows partition using the prober though. Here is the output of the Boot_Info_Script005 file.
Code:
Boot Info Script 0.55 dated February 15th, 2010
============================= Boot Info Summary: ==============================
=> Grub 2 is installed in the MBR of /dev/sda and looks on the same drive in
partition #6 for (,msdos6)/boot/grub.
[code]....
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May 14, 2011
I installed Windows 7, then Ubuntu 11.04, but GRUB can't seem to see my Windows partition.
I ran 'update-grub' but it didn't seem to find Windows.
Other forums seem to suggest editing /boot/grub/menu.lst but I can't even find that file.
Here is the info I get from the 'boot_info_script' code...
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Jun 25, 2011
Just tried installing ubuntu after a clean win7 install. Now windows is only recognized as 'unknown' and update-grub cant finsd the boot loader or bootmgr for windows. heres my boot script
Code:
Boot Info Script 0.60 from 17 May 2011
============================= Boot Info Summary: ===============================
[code]....
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