Unable to install Windows 10

I have a late 2014 iMac and have been trying to install Windows on it.

Bootcamp wouldn't make a bootable USB with the October 2018 update, but it did with the April 2018 update. Everything seems to work fine until it reboots and tries to restart in Windows. I just get the SYSTEM_SERVCIES_EXCEPTION stop code with "What failed: win32kfull.sys"

I have also tried to reboot by pressing the option key on startup. When I choose the "EFI" option, it gives me the same BSOD. When I choose "Windows" it takes me to Windows setup but it tells me that the partition is the wrong format, and that it's a GPT partition. I can format the drive to NFTS, but the GPT error remains.

I've tried erasing and remaking the partition without bootcamp, but it doesn't work.

Any thoughts or solutions?

iMac with Retina 5K display, macOS 10.14

Posted on Apr 25, 2019 9:58 AM

Top-ranking reply

Loner T

Level 9

59,536 points

Posted on May 26, 2019 8:34 PM

Download and install GPT FDisk from https://sourceforge.net/projects/gptfdisk/ .

Rebuild MBR to match the new GPT information thus resetting the Hybrid MBR. Use defaults for other questions (like partition codes). The only values that need modifications are the Boot flags and step 10. Accept all other defaults that Gdisk offers. Please see thesample Q&A as an example. These steps can be repeated if you make a mistake before you get to Step 12, otherwise start from Step 1 for these steps. Step 6 has numbers which are typed with a space between the numbers. Please see the sample Q&A before you execute these steps.

Sudo gdisk /dev/rdisk0
P (Print list of parts)
R (Recover)
O (print current Hybrid MBR)
H (chooses Hybrid)
Partitions numbers to be hybridized: 2 3
Y (Good for GRUB question)
N (part 2 boot flag)
Y (part 3 boot flag make NTFS bootable partition)
O (print current Hybrid MBR)
W (Write the new MBR)
Y (Yes! write the new MBR)
Reboot

Here is sample Q&A for this section. Please notice the Press Enter/Return.

Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? (Y/N): Y

Creating entry for GPT partition #2 (MBR partition #2)

Enter an MBR hex code (default AF): Press Enter/Return

Set the bootable flag? (Y/N): N

Creating entry for GPT partition #3 (MBR partition #3)

Enter an MBR hex code (default 07): Press Enter/Return

Set the bootable flag? (Y/N): Y

Test 1 - Does Bootcamp Volume show up in Finder?

Test 2 - Can you see files in Bootcamp Volume?

Test 3 - Can you select Bootcamp in System Preferences -> Startup Disk?

Test 4 - If Test 3 is successful, select Bootcamp and Click Restart.

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Unable to install Windows 10

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