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Error Code: 800F0A12 (Can't install Win 7 SP1)

Anonymous
2011-02-23T03:51:00+00:00

Hello;

I am currently having installation  issues with SP1 for Windows 7 Ultimate 64 bit.

Code 800F0A12

Suggestions for resolving this issue would be appreciated.

Model : Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz

Total Memory : 6GB DIMM DDR2

 NVIDIA GeForce 8800 GT

Operating System:

Windows System : Microsoft Windows 7 Ultimate 6.01.7600

Platform Compliance : x64

Windows 7 Product ID: 00426-292-5120794-85762

Kind Regards;

Jason

additional details **error:**0X800f0a12

Windows for home | Previous Windows versions | Install and upgrade

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Anonymous
2011-02-23T09:13:03+00:00

If you are used another partitioner, like me, I used linux to get rid of that 100MByte windows partition, and installed linux next onto another HDD, I needed to pull of the cables from the linux HDD and then using only the Win7 HDD I can install Win7 SP1. I hope it's a solution for your problem.

If you still can't install it, or the linux is on the same drive, I think there's no solution. Only to re-partition the whole HDD and use Win7 partitioner.

I found this on: http://windows.microsoft.com/en-US/windows7/windows-7-windows-server-2008-r2-service-pack-1-sp1-installation-error-0x800F0A12

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Anonymous
2011-02-23T07:05:32+00:00

See...

Windows 7 and Windows Server 2008 R2 Service Pack 1 (SP1) installation error: 0x800F0A12

http://windows.microsoft.com/en-US/windows7/windows-7-windows-server-2008-r2-service-pack-1-sp1-installation-error-0x800F0A12

Windows 7/2008 R2 Service Pack 1 fails with 0x800f0a12

http://blogs.technet.com/b/joscon/archive/2011/02/17/windows-7-2008-r2-service-pack-1-fails-with-0x800f0a12.aspx

Fix: The Windows 7 partition must be the Active Partition.

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  1. Anonymous
    2011-02-25T18:16:35+00:00

    Hi .. I had the same issue. The diskpart wont do good for SP1 to install..Linux installation has nothing to do with this issue, dont jump onto reformatting the machine. Just go to Disk management, right click on the partition where the windows 7 OS is installed,and assign the partition as active(Click on Make as active). Run the install again and oila, got it running.

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  2. Anonymous
    2011-06-30T08:57:17+00:00

    I had the same problem 800F0A12 with Windows 7-64 Home Premium . My Dell Inspiron 580MT has a recovery partition without a drive letter assigned to it. After I assigned a drive letter (via disk management) SP1 installed OK. 

    Also my problem with windows backup (0x80070002) was solved after these actions.

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  3. Anonymous
    2011-02-23T20:05:05+00:00

    Had the same problem - assign a drive letter to the 100MB partition before the C: drive using Computer Management/Disk Management and then set the partition active by right clicking on the partition. Then try to reinstall. Worked for me!

    Oh, then delete the drive letter if you want to.

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