Bootcamp Missing Operating System Error
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Boot camp. Then you decide that you need more space on your bootcamp missing operating system windows 7 Windows partition. So you use the Mac's Disk Utility on
Missing Operating System Error Message Appears On Black Screen
the partition tab to shrink the MacOS partition. Then you fire up a live CD how to fix missing operating system error of GParted to expand the Windows partition. Now Windows won't boot and you get the dreaded "Missing Operating System" error. This isn't too difficult
Missing Operating System Boot Camp
to fix. If you boot from your Windows CD and try to run the start up repair utility that comes with Windows, it can't find your partition. I'm not totally sure why this is, but there is an easy fix. A. Open command prompt from Windows recovery option menu. Type what to do if operating system not found "diskpart" at the command prompt. B. At the DiskPart prompt, type in "list disk". You will see the list of disk currently attached to your computer. C. Now type in "select disk n", where n is the disk number. In this example, disk 0 is selected. D. Now that correct disk is selected, type in "list partition" to get a list of all the partitions on that disk. E. To select the partition you want to set as active, type in "select partition n", where n is the partition number. F. Now that you have selected the disk and partition, mark it as active by just typing the word "active" and pressing Enter. Now the partition is set active. G. Exit from the command prompt and run startup repair. That's it! Windows will repair the partition and it will boot. Powered by WordPress | Designed by Elegant Themes
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Discussion There are commercial utilities for resizing a bootcamp partition like Camptune or WinClone, but they are unnecessary. Disk Utility will shrink the OS X partition to make space. Booting to http://blog.thefelt.net/gparted-windows-8-boot-camp-partition-missing-operating-system/ a Linux USB Drive with GParted can then expand the NTFS partition, and Windows' http://forums.macrumors.com/threads/bootcamp-giving-missing-operating-system-error.1163559/ bcdboot can fix the resulting error. Solution Boot to a Windows 8 USB drive and get to a command prompt. Then use diskpart to set the NTFS partition to Active, and run bcdboot to repair the boot files. Example steps: Boot to a Windows 8 USB drive. Next… Repair… Troubleshoot… Advanced… Command Prompt. At the operating system prompt, run diskpart, set the partition to Active, and run bcdboot with your Windows directory as a parameter. Here is a sample command sequence: diskpart select disk 0 list part select part 4 active exit bcdboot d:\windows The results will look something like this: Use disk part, then bcdboot. And finally, type exit to restart… This got rid of the "Missing Operating System" error and allowed Windows to boot. missing operating system Optional As a result of the bcdboot command, there was an annoying extra entry in my list of boot loaders: One too many Windows So, I removed the extra entry using bcdedit. First, find the GUID entry you want to delete (hint: it's the one not labeled current). Then, delete that entry: Remove the extra entry with BCDEdit bcdedit /delete {your-GUID-here} Now the machine will boot straight into Windows just as it did before, but with a handily resized partition. No extra commercial software required. This process can also be used in reverse, i.e. boot to Linux, use GParted to shrink the NTFS partition, repair with bcdboot, then use Disk Utility to enlarge the OS X partition. RELATED POSTS OCZ Agility 3 SSD in a Macbook How to Run Windows 7 from a USB Flash Drive Tech Notes: Delete with Impunity Retina Display Image Retention: Fix Yourself with a Custom Random Screen Saver Tagged as: GParted, OS X, SSD, Windows, Windows 8 Categorized in: Problem/Solution, Technology February 23, 2013March 1, 2015 Alex12 Comments Post navigation Netgear WN1000RP and AT&T 2WIRE DSL Router Configuration IssuesRaspberry Pi Time Machine Problems/Solutions 12 thoughts on “GParted: Windows 8 Boot Camp Partition "Missing Operating System"” Jerome says: May 4, 2013 at 6:36 pm I have
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