Unable to install Windows 8 getting error 0xc000012f(4 posts)
It is a bad idea to install the Win8 CP over your Win7 system. I suggest you define an extra partition for Win8 and install into that partition. That partition can be a logical partition. Then you get a double boot for both systems.
Be careful with the definition of a new partition though (even a logical partition). Check first in Disk Management whether you have only 3 (or less) primary partitions on that disk. If you have already 4 primary partitions, you have to first convert one of the primaries to logical, else you get a BIG problem with dynamic partitions.
It would be better if you didn't install over your Windows 7 partition because Windows 8 CP only runs until January 2013 and if you want to go back it will be harder if you don't have a disc and multi-use product key. You can install the Windows 8 CP on a VHD (Virtual Hard Drive) using this article. I just did this and it worked flawlessly! If you don't like the VHD, you just have to delete the VHD and re-write the Master Boot Record. Here is a link with better un-installation instructions. Hope this helps!
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