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Error: "We couldn't create a new partition or locate and existing one" installing Windows 8.1 via Bootcamp

This error comes up when selecting a partition to Install Windows on. The partition is formatted NTFS.


Apple support said it might be because there are other USB devices plugged in but I get the same error even if the only USB is the Windows Install. Any other possible solutions?


Thanks,

JoeShmoe

MacBook Air, OS X Mavericks (10.9.4), Boot Camp 5.1.2

Posted on Sep 10, 2014 2:03 AM

Reply
Question marked as Best reply

Posted on Sep 10, 2014 3:04 PM

Read and follow the Boot Camp instructions located here: http://www.apple.com/support/bootcamp/


You can not install Windows onto an already formatted drive. You have to follow the Boot Camp instructions.

48 replies

Sep 19, 2014 4:41 AM in response to JoeShmoe99

I was going to warn you not to run Windows update. Since you now have a working procedure, please blow away the MSR and MS Data partitions, convert them to Free Space, and re-install Windows. Do not forget to install Bootcamp drivers. Do not use Windows update for HW drivers. I would recommend using only Security and Office updates.


Also, let the Apple Geniuses/Windows Technicians know what you did. It is painful at times, when they want to charge you money for something that they should be doing free.

Sep 19, 2014 8:35 AM in response to JoeShmoe99

This is another option. Remove Windows. Re-install it. Instead of using the setup.exe from Bootcamp folder, run each individual .exe driver file except the Graphics driver. This will force Windows to use the standard driver, but this means connecting external displays will not work. You will have a functional system without fancy graphics. You will also have a yellow triangle with an exclamation for HW that does not have the driver.


If you want to post a listing of drivers from your bootcamp USB, I can help pick which ones to install and which ones not to.

Sep 20, 2014 11:55 PM in response to Loner T

Ok so here's what I did. My whole reason for getting Windows running in the first place was to use this external GPU. So I reinstalled Windows, installed the eGPU graphics drivers first (which only work for an external monitor), then installed the Boot Camp Support Software with my external monitor connected, restarted, then used Device Manager to roll back the HD3000 drivers. So this is almost the same installing each other driver individually.


It's still not perfect though. Nothing runs as well as it used to with a clean BIOS install. Unfortunately that's still not working for some reason. C'est la vie


Thanks for all your help!

If anyone else is reading this and needs help feel free to message me so we can give Loner T a break.


-JoeShmoe99

Jan 26, 2015 6:01 PM in response to Loner T

Hello.


I am having a similar issue to JoeShmoe99. I receive the same error message "We could not create a new partition or locate an existing one. For more information see the setup log files." This message is obtained after Windows asks to reformat the drive.


I have reviewed this feedback that you provided to JoeSchmoe99 but am not sure on how to proceed. My computer is an iMac 5K with Yosemite installed. Here is the output of the disktutil list command. Any help is appreciated. Thank you!



new-host-5:~ Hector_Desk$ diskutil list

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *251.0 GB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage 150.3 GB disk1s2

3: Apple_Boot Recovery HD 650.0 MB disk1s3

4: Microsoft Basic Data 99.8 GB disk1s4

/dev/disk4

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD *150.0 GB disk4

Logical Volume on disk1s2

7ACE478F-314C-4B6D-B880-1D6556E18BD5

Unencrypted

/dev/disk5

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *31.9 GB disk5

1: DOS_FAT_32 WININSTALL 31.9 GB disk5s1

new-host-5:~ Hector_Desk$

Jan 27, 2015 6:57 PM in response to Loner T

ok. I re-reviewed all your posts again and finally tried something that I had not done before . . . and it worked!


I disconnected the thunderbolt cable that I had connected to the Imac. The thunderbolt cable linked to a external hard drive. This did the trick. Windows installed fine thereafter. Thank you!


-hector

Jan 28, 2015 6:37 AM in response to Gooz5

Gooz5 wrote:


ok. I re-reviewed all your posts again and finally tried something that I had not done before . . . and it worked!


I disconnected the thunderbolt cable that I had connected to the Imac. The thunderbolt cable linked to a external hard drive. This did the trick. Windows installed fine thereafter. Thank you!


-hector

The Windows installer is very sensitive to any storage that can cause it problems. Glad to see it working.

Mar 2, 2015 12:31 PM in response to Loner T

Hi


I am facing the same issue after 15 hours spent with Apple support and no luck.


I have attached the results of the above commands. My USB2 16Go flash stick was still connected when I ran them. I see two partitions in Disk Utility. The bootcamp partition of 360Go is formatted to NTFS (as shown as after the third command).


Does that sound right to you?


I bought this iMac two months ago. It has a 1TB Fusion drive. I managed to install windows very easily when I got the computer but had to delete the partition (used Bootcamp). Now trying to te-install windows.


Any help is extremely appreciated! Thank you!


Last login: Mon Mar 2 19:59:03 on console

charles-pc:~ Charles$ diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage 121.0 GB disk0s2

3: Apple_Boot Boot OS X 134.2 MB disk0s3

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage 638.9 GB disk1s2

3: Apple_Boot Recovery HD 650.1 MB disk1s3

4: Microsoft Basic Data 360.5 GB disk1s4

/dev/disk2

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD *754.0 GB disk2

Logical Volume on disk0s2, disk1s2

5AF6F133-EDD1-4A59-98D9-6398F79F408D

Unencrypted Fusion Drive

/dev/disk3

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *15.6 GB disk3

1: DOS_FAT_32 WININSTALL 15.6 GB disk3s1

charles-pc:~ Charles$ sudo gpt -vv -r show /dev/disk1

Password:

Sorry, try again.

Password:

Sorry, try again.

Password:

gpt show: /dev/disk1: mediasize=1000204886016; sectorsize=512; blocks=1953525168

gpt show: /dev/disk1: PMBR at sector 0

gpt show: /dev/disk1: Pri GPT at sector 1

gpt show: /dev/disk1: Sec GPT at sector 1953525167

start size index contents

0 1 PMBR

1 1 Pri GPT header

2 32 Pri GPT table

34 6

40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

409640 1247785824 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

1248195464 1269760 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

1249465224 1144

1249466368 704057344 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

1953523712 1423

1953525135 32 Sec GPT table

1953525167 1 Sec GPT header

charles-pc:~ Charles$ sudo fdisk /dev/disk1

Disk: /dev/disk1 geometry: 121601/255/63 [1953525168 sectors]

Signature: 0xAA55

Starting Ending

#: id cyl hd sec - cyl hd sec [ start - size]

------------------------------------------------------------------------

1: EE 1023 254 63 - 1023 254 63 [ 1 - 1953525167] <Unknown ID>

2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

charles-pc:~ Charles$ sudo dd if-/dev/rdisk1s4 count=1 2>/dev/null | hexdump -C

charles-pc:~ Charles$ sudo dd if=/dev/rdisk1s4 count=1 2>/dev/null | hexdump -C

00000000 eb 52 90 4e 54 46 53 20 20 20 20 00 02 08 00 00 |.R.NTFS .....|

00000010 00 00 00 00 00 f8 00 00 3f 00 ff 00 00 58 79 4a |........?....XyJ|

00000020 00 00 00 00 80 00 80 00 ff 0f f7 29 00 00 00 00 |...........)....|

00000030 00 00 0c 00 00 00 00 00 02 00 00 00 00 00 00 00 |................|

00000040 f6 00 00 00 01 00 00 00 a5 0a 34 34 11 34 34 82 |..........44.44.|

00000050 00 00 00 00 fa 33 c0 8e d0 bc 00 7c fb 68 c0 07 |.....3.....|.h..|

00000060 1f 1e 68 66 00 cb 88 16 0e 00 66 81 3e 03 00 4e |..hf......f.>..N|

00000070 54 46 53 75 15 b4 41 bb aa 55 cd 13 72 0c 81 fb |TFSu..A..U..r...|

00000080 55 aa 75 06 f7 c1 01 00 75 03 e9 dd 00 1e 83 ec |U.u.....u.......|

00000090 18 68 1a 00 b4 48 8a 16 0e 00 8b f4 16 1f cd 13 |.h...H..........|

000000a0 9f 83 c4 18 9e 58 1f 72 e1 3b 06 0b 00 75 db a3 |.....X.r.;...u..|

000000b0 0f 00 c1 2e 0f 00 04 1e 5a 33 db b9 00 20 2b c8 |........Z3... +.|

000000c0 66 ff 06 11 00 03 16 0f 00 8e c2 ff 06 16 00 e8 |f...............|

000000d0 4b 00 2b c8 77 ef b8 00 bb cd 1a 66 23 c0 75 2d |K.+.w......f#.u-|

000000e0 66 81 fb 54 43 50 41 75 24 81 f9 02 01 72 1e 16 |f..TCPAu$....r..|

000000f0 68 07 bb 16 68 52 11 16 68 09 00 66 53 66 53 66 |h...hR..h..fSfSf|

00000100 55 16 16 16 68 b8 01 66 61 0e 07 cd 1a 33 c0 bf |U...h..fa....3..|

00000110 0a 13 b9 f6 0c fc f3 aa e9 fe 01 90 90 66 60 1e |.............f`.|

00000120 06 66 a1 11 00 66 03 06 1c 00 1e 66 68 00 00 00 |.f...f.....fh...|

00000130 00 66 50 06 53 68 01 00 68 10 00 b4 42 8a 16 0e |.fP.Sh..h...B...|

00000140 00 16 1f 8b f4 cd 13 66 59 5b 5a 66 59 66 59 1f |.......fY[ZfYfY.|

00000150 0f 82 16 00 66 ff 06 11 00 03 16 0f 00 8e c2 ff |....f...........|

00000160 0e 16 00 75 bc 07 1f 66 61 c3 a1 f6 01 e8 09 00 |...u...fa.......|

00000170 a1 fa 01 e8 03 00 f4 eb fd 8b f0 ac 3c 00 74 09 |............<.t.|

00000180 b4 0e bb 07 00 cd 10 eb f2 c3 0d 0a 41 20 64 69 |............A di|

00000190 73 6b 20 72 65 61 64 20 65 72 72 6f 72 20 6f 63 |sk read error oc|

000001a0 63 75 72 72 65 64 00 0d 0a 42 4f 4f 54 4d 47 52 |curred...BOOTMGR|

000001b0 20 69 73 20 63 6f 6d 70 72 65 73 73 65 64 00 0d | is compressed..|

000001c0 0a 50 72 65 73 73 20 43 74 72 6c 2b 41 6c 74 2b |.Press Ctrl+Alt+|

000001d0 44 65 6c 20 74 6f 20 72 65 73 74 61 72 74 0d 0a |Del to restart..|

000001e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|

000001f0 00 00 00 00 00 00 8a 01 a7 01 bf 01 00 00 55 aa |..............U.|

00000200

charles-pc:~ Charles$

Error: "We couldn't create a new partition or locate and existing one" installing Windows 8.1 via Bootcamp

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