No Boot Manager On Dual Boot System
Oct 9, 2015
Today I installed Windows 10 on my machine (ASUS N55SF laptop) for the first time on a separate hard drive. Now I have Windows 7 on my main hard drive and Windows 10 on my new drive (the latter being an SSD one). After installing Windows 10, I got a new boot option in my BIOS called "Windows Boot Manager" which is set as default, but it runs Windows 10 directly, I can't see any boot manager (I can assure "Windows Boot Manager" behaves this way because my BIOS lets me override the boot option, so that I can directly run any boot option, and this is probably the only way I can run Windows 7 currently).
If I go to Start → Advanced system settings → Startup and Recovery → Settings, I only see Windows 10 in the "Default operating system" drop-down menu, while I only see Windows 7 if I do this while on Windows 7. It's like the two OSs are not completely aware of each other.
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Jan 27, 2016
In my desktop I have two hard disks ( disk 0 and disk 1 ) . Disk 1 is a clone of disk 0 created by Macrium Reflect
Disk 0 : ( C: ) windows 10 pro , upgrade from windows 7 , ( E: ) windows 8.1 pro , ( G: ) Storage partition
Disk 1 : clone of disk 0
problem description : I see in msconfig / boot a wrong listing
windows 10 ( C:WINDOWS) : Current OS ; Default OS
windows 8.1 pro ( H:WINDOWS ) instead of ( E:WINDOWS )
Nevertheless the dual booting works fine as well as the shift between the disks via BIOS.
The question is , could I fix the situation using the EasyBCD of Neosmart Technologies to edit the bootloader ?
I see can change drive letter H: to E: and save the change , am I right or wrong ? or any other way ....
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Aug 13, 2015
I have two systems.System 1 is a desktop running W7 Premium SP1. I did clean install of W10 from iso on separate partition. W10 will not activate using W7 numbers. I suspect that is because I moved W7 to an SSD 6 mos. ago and W10 expects the old HDD. BTW, installed W10 to partition on the SSD
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Sep 18, 2015
I had Win7 and did the free upgrade to Win10.
Before the upgrade I was smart enough to do a complete system image of Win7.
1. If I disconnect the Drive that Win10 is installed on and reinstall Win7 on a different drive, can I use the system image to recover Win7 back to the state it was before the upgrade?
2. Reconnect the Win10 drive and and boot up the system, will system ask which OS I want to boot up with at that point or will there be a conflict?
It's not that I don't like Win10 given I just upgraded on Thursday, September 17th and I need time to fully go thur all the operations and functions. I want to get a reasonable working knowledge and understanding of the Win7 OS, till I do I want the ability to keep and use Win7.
It took me quite some time to migrate from XP Pro to Win7 because I created a dual boot system for that purpose and I do not want to be FORCED cold turkey to switch to a new OS till I am ready to do so.
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Feb 10, 2016
I created a dual boot system quite some time ago and all was well until.RTM partition was completely up-to-date. I had recently updated to Windows 10 Build 10251 on the Insider partition.I turned the machine off on Sunday January 31, left town, and returned Saturday February 6. All was well with the dual boot when I turned the system off before leaving. When I turned the system on last night, it booted directly into the Insider Partition. There seems to be no option to boot into the RTM partition.
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Aug 13, 2015
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Sep 3, 2015
My situation is that after a recent issue with my user profile going "missing" (I think) I thought do, do you know what I'll just reset my system and start over. But windows 10 would not reset. Instead I grabbed the windows 7 disk to reset that later hoping to install windows 10.
I was having problems with my Kingston SSD so I installed it onto my HDD and later on tried to clone the HDD to the SSD and then format the HDD so the OS ran off the SSD. I have clone the 2 drives but haven't formatted the HDD. I tried booting the SSD but it comes up with the BOOTMGR IS MISSING! I find a solution which is to reset the bootmgr using the code "Bootrec.exe /rebuildcd" but I can type the command in due to not being able to access the system repair.
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Nov 25, 2015
I have a dual boot system in the following configuration:
HDD-0 = Win7 OS, HDD-1 = Win7 OS, WinXP OS. I have successfully booted into each of these operating systems - and the Win7 OS on HDD-1 is an exact clone of the primary OS on HDD-0.
I just upgraded the Win7 OS on HDD-0 to Windows 10 using the "Get Windows 10" process. I now get the new blue Boot Manger screen with all three OS's listed and I can successfully boot into Windows 10 and Windows XP. But I cannot boot into the Win7 OS on HDD-1 (which I could before the Windows 10 upgrade). How the upgrade even knew about the other copy of Windows 7, since it was not active and lives on another HDD is beyond me.
One strange thing - if I do a cold startup (power on) I get the new Boot Manger screen. But if I do a Restart from Windows 10, I get the old, black & white boot manger screen - and it does list all three OS's correctly, too.
The error message I get when trying to open (boot) the Windows 7 OS is: "LogonUI.exc - Entry point not found. RtlReleasePath could not be located in the ntdll.dll" And, like others, I now get the black screen with "Windows 7, Build 7601 This copy of Windows is not genuine (but it was yesterday before the Windows 10 upgrade on the other HDD).
And like others, I can start the Crtl+Alt+Del to get the screen with users, Task Manger, etc. And, I can run all my applications by manually starting them in a New Task and browsing to the exe file - like Firefox.exe or Word.exe So, it looks like Windows 7 started and may be running. I just can't get into it.
I think both issues, the LogOn and the "Not Genuine" are both related to the Entry Point no located in the ntdll.dll.
At this point I really don't want to reload Windows 7 since it appears to be running and all the apps can be run manually.
All this happened after the upgrade of the other Win7 on HDD-0.
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Sep 24, 2015
My laptop has dual boot - Windows 7 and Windows 10. My Win7 environment is my main working environment with lots of programs installed and important files. I installed the Win10 environment just to play around with 10 during the technical preview. Now, I would like to disable the 10 environment and upgrade the 7 to 10. Am I able to do this, or have I already "used up" my one upgrade on this computer's Windows license?
I notice that in Windows 7 I have not received the icon in the notification area that invites me to upgrade to 10. This makes me think I might have used up my chance to upgrade.
My end goal is to have a single Windows 10 environment. Note that the reason I want to upgrade my 7 environment to 10 is because I don't want to have to re-install all of my programs and files into the current 10 environment.
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Jun 15, 2015
After several weeks of testing I'm ready to go full on Windows 10 and want to get rid of Windows 7 but I have some partitioning issues I want to clean up. I currently have Windows 7 on drive 0 (360 GB) and Windows 10 on drive 1 (500 GB). Both are SATA drives and RAID is enabled in the bios but not active.
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Aug 15, 2015
I would like to know how to dual boot my win 10 pc with osx as my secondary os. I need mac as I need to see important messages that I receive when I use my pc.
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Dec 19, 2015
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Mar 4, 2016
I have Windows 10 and 8.1 dual booted but I’m having trouble removing 8.1. 10 is on a Seagate 2TB HDD, and 10 is on a Samsung 2TB HDD. Both are SATA and my motherboard is BIOS. As long as the Samsung (8.1) is drive 0 and is boot’s first choice, all is well. I get the option to select either OS, and either one can be made default.
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Jan 3, 2016
I attempted to set up a dual boot configuration using my existing Win 7 Pro on a Samsung SSD drive, and a clean install of Win 10 Pro on a fresh Kingston SSD drive. I created bootable Windows 10 installation USB, reset the UEFI Bios boot order and proceeded with the install. Win 10 installed, however it would not recognize the Win 7 Pro drive. I checked the UEFI Bios again, and the Samsung SSD was no longer shown in the "Fixed Boot Order Priorities". However, it was listed under "Hard Drive BBS Priorities", and under "Boot Override". It also shows up in Win 7 in the drives listings.
My motherboard is a MSI Z97 Gaming 5, with Click Bios 4 v1.9.
I must also mention, my Samsung SSD with Win 7 Pro was set up not with UEFI but Legacy boot. This was my first mobo with UEFI, so I made that mistake due to my ignorance.
I reformatted the Kingston Win 10 drive. Rebooted, but got error message that boot device not found. I rebooted and hit F11 to get back into Bios. A popup box gave me a listing of bootable devices and the Samsung SSD appeared. Selected it and it booted into Win 7 no problem. I went back into the Bios, but the Samsung SSD still not listed. I shut down the system, unplugged the Kingston SSD, rebooted, went back into Bios, and the Samsung returned.
I then shut down the system, connected the Kingston into a different SATA port, rebooted the system, went back to Bios, and the Kingston remains unlisted in the "Fixed Boot Order Priorities" as before, but shows up in "Hard Drive BBS Priorities", and under "Boot Override". It also shows up in Win 7 in the drives listings. Remember that the Kingston is just formatted, no op system installed on it.
I set up the Win 10 install on the Kingston SSD as a legacy drive too. Another question I will ask is can you have one operating system on a legacy drive and one on a UEFI drive in the same PC?
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My dual boot configuration has 10 with classic shell and 7 pro. Classic shell has settings for taskbar which control opacity and color. My 7 just showed a nearly transparent taskbar so I went to 10 and changed classic shell taskbar settings to opaque then back to 7 and the taskbar was now opaque.
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Jul 16, 2015
So i currently have windows 10, build 10162, and i like the OS X, especially since i do video editing, and i love the workflow. The problem is, everything on my PC is optimized for windows, and some things wouldnt work on a mac, and i didnt want to spend the money on a mac. I know its possible to dualboot some OS's so i want to know if theres a way i can just add an OS to my current pc. I have an extra HDD that i could put it on. And i want to put Yosemite on it, and i also have an intel CPU, nvidia card, which i believe is necessary for a hackintosh.
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Jul 31, 2015
I'm planning to download the iso, or whatever file it is from the Microsoft website, and install it using that. (I never got the taskbar notification,.how I can make a dual boot on my second hard drive using that download (another thread I made, I've gotten the hard drive working and want that to be my dual boot, not having two operating systems on one hard drive)
I would like Windows 10 on my second, completely wiped hard drive.Unless I'm able to use my Windows 7 disk to install it on the second hard drive, and use the Windows 10 download to upgrade it on that hard drive in particular?
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Aug 4, 2015
I just installed windows 10 on my second ssd and I have win 7 on a different.
How do I get a screen at bootup so I can pick what os to start?
Now I have to go to bios and change boot order of drivers every time I want to boot into a different os. I get no boot screen where i can just select what to start.
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Jul 18, 2015
On the bottom of windows 7 there is a icon to upgrade to windows 10. However, is there/will there be a way to upgrade to windows 10 and keep windows 7 in a dual boot configuration.
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Jul 7, 2015
I've installed Win10 on secondary HDD and I kept my WIndows 7 on different HDD.How do I setup dual boot?Each time PC reboots its loading only windows 10 without any dual boot.I can change the boot order in my BIOS but it would be great if I can do it via dual boot
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Jul 19, 2015
I'm using WIn 8.1 as my main OS, but I have the 10 Home preview (Build 10240) on a second hard drive and I'm dual-booting. But there's something strange happening:
- If i set WIndows 10 as the default OS, then the PC boots to the OS selection screen and gives me 30 seconds to pick which one I want to use
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I'd prefer to have 8.1 as the default, but I don't want to go into BIOS every time I want to switch between them.
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Jul 2, 2015
So, currently, we're trying to dual-boot Windows 10 Technical Preview on a Toshiba laptop with Windows 8.1. We already got the partitioning set up and everything, but when trying to install, it says we can't install to a GBT partition, or something along the lines of that.
We went to try to install it the same way that you do for Windows 7 and everything else, but upon setting the disk drive to the boot device, it still loaded into Windows 8. After a little Google work, I found that Secure Boot must be turned off, and that the BIOS option has to be changed from UEFI to CSM. After doing that, we could boot into the Windows 10 disk. However, when trying to install it, it says "Windows cannot be installed on this disk. The selected disk is of the GPT partition style"
We would like to fix it, and I found a way to do so on a Microsoft forum, and that's as follows:
1. Boot up to installation DVD/CD.
2. Click install but don't follow through.
3. Press SHIFT-F10 to bring up console.
4. Type "diskpart"
5. Once inside diskpart type:
-> list disk (find the one you want to convert)
-> select disk 0 (select the one you want from the list)
-> convert mbr (should take a second or two)
-> quit
6. Continue with install
But I need to know if it will format the entire hard drive, as I'd prefer not to lose the data on the primary partition. If we can do it while only formatting the partition for Windows 10, that would be fine (as that's empty already anyway).
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Sep 14, 2015
I was playing with disc partitions and i accidentally deleted something... The problem is, that when i start my computer, Windows boot manager error appears (with no options, nothing, just some text about how should i reinstall / repair...), but when i start my computer, i have no way to access BIOS (I know how to access bios in my pc, I was accessing it like 20 times during last few days while installing various OSs... always with F2).
So actually I am stuck in a loop: start pc - cant access bios - windows boot manager error- restart - cant access bios - win boot manager error - restart....
With windows, i had problems with accessing bios before, but it could be solved by some kind of "absolute shutdown" of a system - holding shift while clicking "Shut down" - then i could easily enter bios with F2 during start.
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Aug 29, 2015
I upgraded to Windows 10 from Windows 7 and everthing installed without problems exept when I start or restart with a usb flash drive inserted, I get "Boot manager is missing". If I remove the flash drive and select Control-Alt-Delete windows starts with no problems.I realize the Windows trying to boot to the usb and fails.
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Jan 8, 2016
I keep having trouble with my laptop it hasn't been even starting up in weeks, I turn it on and this it's black with a blue window that sus Default Boot Device missing or Boot Failed, insert recovery media or hit any key
Then select boot manager to choose a new boot device or to boot recovery media. So I hit enter and I go to boot manager and boot option menu but there's no options....
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Aug 4, 2015
I have Windows 7 and Windows 10 Enterprise Build 10240 set up in a dual boot configuration on the same hard drive. Windows 7 is the first partition on that drive and Windows 10 is the second. I have decided to keep Windows 10 as my main OS and want to remove Windows 7 and reclaim that space for the Windows 10 partition.
What is the easiest way to accomplish this without a complicated and long procedure? I have tried Easeus Partition Master 10.5, but am unable to format or delete this active partition. I tried to format and/or delete this through Windows 10 as well with no success.
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