How To Repair Bootcamp Partition From Windows 7 Partition

I recently installed the latest copy of Mac Bone Ten and lost the Bootcamp Windows sectionalization kick entry from the MBR (Master Boot Tape). It took a series of steps to go the Bootcamp segmentation boot entry dorsum into the MBR and and then I decided to document the procedure. On an unrelated annotation, this write upwards also involved resetting the Windows vii password since I realized that I forgot the Windows password.

The trouble is that when the disk structure is modified, the Bootcamp kick entry is lost from the MBR. However, the partition even so exists and the files inside the Bootcamp segmentation are untouched. This can be verified by logging into the alternating Os (Mac OS X) and using Disk Utility to look at the sectionalisation structure. The Bootcamp sectionalization should still be at that place. If it is, the file explorer tin can be used to verify that the files within the Bootcamp sectionalisation all still exist. We can now begin restoration of the Bootcamp kicking entry.

Step ane. Obtain gptfdisk

Head over to sourceforge and obtain the latest copy of gptfdisk: https://sourceforge.net/projects/gptfdisk/

Nosotros will use this tool to derive some disk data. After installing this tool, bring upwardly a Terminal window and execute:

          sudo gpt -r -vv bear witness disk0   sudo fdisk /dev/disk0   diskutil list                  

Locate the Bootcamp partition and notice the partition number assigned to it. In my case, it was 5. You can besides verify this in Disk Utility where clicking info nearly the Bootcamp segmentation should bear witness something like disk0s5,likewise annotation that the bootable flag is likely ready to no at this fourth dimension.

Now that we are equipped with the knowledge of what the disk number is for the Bootcamp partition, we can brainstorm the procedure of restoring the Bootcamp entry in MBR.

Stride ii. Restore Bootcamp entry in the MBR

Utilize the gdisk tool as follows to restore the partition entry:

          sudo gdisk /dev/disk0   r   h   five   Identify EFI GPT (0xEE) division first in MBR (adept for Grub)? y   take default code of 07   set up bootable flag? y   do non protect more partitions? n   o   west   proceed? y                  

Exit the terminal at this signal and restart Mac. Press and hold the ALT cardinal at kick time and the Bootcamp boot entry should now appear in the MBR. We take fixed the problem.

Addendum

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I forgot the Windows 7 password since I hadn't logged into for a while (I don't really use this Windows partition for another but to play some games and I couldn't fifty-fifty practice that with the Bootcamp boot entry missing). So now I had to find a fashion to reset Windows seven password. Turns out the old renaming sethc, copying command prompt executable and renaming it sethc.exe play tricks however works! Hither's how it goes.

Step one. Restart Windows and hard reset (long printing the power button) as the Windows icon appears on the screen. Windows should now outset in repair style.

Step 2. Take advantage of the repair mode and await for information technology to attempt the repair (this takes several minutes). Once done, click view study details and click on the link down below that ends in a .txt. This will open up the written report in text editor.

Stride 3. Utilise the open feature of text editor to navigate to Windows/system32 directory and rename sethc to something random. At present brand a copy of cmd.exe and rename this copy to sethc.

We have now renamed a copy of control prompt and associated it with the sticky keys functionality.

Step 4. Nosotros kick into Windows again and arrive at the login screen. At this point, we press gluey keys five times to active the viscid keys functionality, which volition now fire upwards the command prompt.

Footstep 5. We now take reward of the command prompt to execute the following commands to reset the countersign

          cyberspace user   net user <USERNAME> *                  

We have now successfully changed the password and can at present utilize this password to login.

Source: https://amirootyet.com/post/repair-bootcamp-partition-boot-entry/

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