- Windows 7 Os Loader Missing. Windows 7 os loader missing What is a Boot Loader? - Definition from TechopediaMay 13, 2011 OS Loader missing I am running Windows 7 on an Lenovo W700 and and getting could us some help.
- Apr 15, 2013 Boot Manager Failed to Find OS Loader. On Apr 4, 2013 at 18:41 UTC. General Hardware. Next: 3 different Graphic Cards, monitor 1 of 2 keeps flickering, Motherboard Issue? 53,666 Followers. I also ran most of the other tools available on the Windows 7 install disk.
- I recently ran a Ubuntu Gnome 16.04 live CD on a windows machine. I thought that this was perfectly safe but it damaged the boot loader of the Windows installation and now I can not get Windows to boot properly. The Disc Repair tool (GUI) concludes 'MissingOsLoader'. I have tried all the bootrec /fixmbr.
Vista Missing Os Loader
There are a number of possible causes for BOOTMGR errors, including the most common 'BOOTMGR is missing' error message.
Unfortunately, if I pick Windows 7, it goes into repair mode and will not boot correctly and I cannot figure out how to stop the repair cycle or get the dual boot to correctly launch Windows 7. I still continue to get 'Missing OSLoader' from the repair log for Windows 7 if I boot from the corrupted OS loader. Feb 05, 2009 Missing OS loader - posted in Windows Vista and Windows 7: Hi, I am desperate for some help here today. I have searched for help through Google but I always come back here, you guys are great. I pluggged my daughters POS MP3 player into my laptop last night just to add a couple of songs and it would not work. It ended up deleteing everything from the MP3 but said it was full.
The most common reasons for BOOTMGR errors include corrupt and misconfigured files, hard drive and operating system upgrade issues, corrupt hard drive sectors, an outdated BIOS, and damaged or loose hard drive interface cables.
Another reason you might see BOOTMGR errors is if your PC is trying to boot from a hard drive or flash drive that is not properly configured to be booted from. In other words, it's trying to boot from a non-bootable source. This also would apply to media on an optical drive or floppy drive that you're trying to boot from.
There are few ways that the 'BOOTMGR is missing' error may show up on your computer, with the first error I have listed being the most common:
Windows 7 Fix Os Loader Missing
The 'BOOTMGR is missing' error displays shortly after the computer is turned on, immediately after the Power On Self Test (POST) is complete. Windows has only initially started to load when the BOOTMGR error message appears.
BOOTMGR issues apply to Windows 10, Windows 8, Windows 7, and Windows Vista operating systems only.
Windows XP does not utilize BOOTMGR. The equivalent function in Windows XP is NTLDR, which produces the NTLDR is Missing error when there's a similar problem.
How to Fix 'BOOTMGR Is Missing' Errors
Restart the computer. The BOOTMGR error could be a fluke.
Check your optical drives, USB ports, and floppy drives for media. Often times, the 'BOOTMGR is Missing' error will appear if your PC is trying to boot to a non-bootable disc, external drive, or floppy disk.
If you find that this is the cause of your issue and it's happening regularly, you might want to consider changing the boot order in BIOS so the hard drive is listed as the first boot device.
Check the boot sequence in BIOS and make sure the correct hard drive or other bootable device is listed first, assuming you have more than one drive. If the wrong drive is listed first, you could see BOOTMGR errors.
I know I sort of hit on this in the troubleshooting step above, but I wanted to call out specifically that you might have the wrong hard drive listed since many BIOS/UEFI systems allow you to specify a particular hard drive to be booted from first.
Reseat all internal data and power cables. BOOTMGR error messages could be caused by unplugged, loose, or malfunctioning power or controller cables.
Try replacing the PATA or SATA cable if you suspect it might be faulty.
Perform a Startup Repair of Windows. This type of installation should replace any missing or corrupt files, including BOOTMGR.
Even though a Startup Repair is a common solution for BOOTMGR problems, don't worry if it doesn't fix your problem. Just continue troubleshooting - something will work.
Write a new partition boot sector to the Windows system partition to correct any possible corruption, configuration problem, or other damage.
The partition boot sector is an important piece in the boot process, so if there's any issue with it, you'll see problems like 'BOOTMGR is Missing' errors.
Rebuild the Boot Configuration Data (BCD). Similar to the partition boot sector, a corrupted or incorrectly configured BCD could cause BOOTMGR error messages.
The following troubleshooting steps are much less likely to help fix your BOOTMGR problem. If you've skipped any of the above ideas then you may have overlooked a very likely solution to this problem!
Check the hard drive and other drive settings in BIOS and ensure they are correct. The BIOS configuration tells the computer how to use a drive, so incorrect settings can cause problems like BOOTMGR errors.
There's usually an Auto setting in BIOS for hard disk and optical drive configurations, which is usually a safe bet if you're not sure what to do.
Update your motherboard's BIOS. An outdated BIOS version can sometimes cause the 'BOOTMGR is Missing' error.
Perform a clean installation of Windows. This type of installation will completely remove Windows from your PC and install it again from scratch. While this will almost certainly resolve any BOOTMGR errors, it's a time-consuming process due to the fact that all of your data must be backed up and then later restored.
If you can't gain access to your files to back them up, please understand that you will lose them all if you continue with a clean installation of Windows!
Replace the hard drive and then install a new copy of Windows. If all else has failed, including the clean installation from the last step, you're most likely facing a hardware issue with your hard drive.
Assuming it's not a hardware issue, your BOOTMGR should be fixed.
Don't Want to Fix This Yourself?
If not you're not interested in fixing this BOOTMGR problem yourself, see How Do I Get My Computer Fixed? for a full list of your support options, plus help with everything along the way like figuring out repair costs, getting your files off, choosing a repair service, and a whole lot more.
I recently ran a Ubuntu Gnome 16.04 live CD on a windowsmachine. I thought that this was perfectly safe but it damaged the boot loader of the Windows installation and now I cannot get Windows to boot properly. The Disc Repair tool (GUI) concludes'MissingOsLoader'.
I have tried all the bootrec /fixmbr
etc and I downloaded and ran 'WindowsRepair' from SourceForge -- no luck.
The most important thing here is, of course, not to destroy thecontents of the hard drive, but I also think that there must be a wayto restore the Windows installation already present on the harddrive.
Now I have a brand new Windows 7 DVD and I have seen suggestions thatI could start the computer with this DVD and click my way throughuntil I see a link to 'Repair Windows' (or similar).
Can I use this option without facing the risk of loosing the contentsof the older Windows installation?
Failed To Find Os Loader
1 Answer
Have you tried cleaning your hard drive? If not you can put the new Windows 7 disk in, then as soon as it comes up hit Shift+F10 for the CMD window.
Type:
When this is finished, type:
When that is finished, type:
The CMD window will close.
Your windows install window should still be up.
Run the install.