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How to solve the problem? (The existing system is Windows 7, 64-bit.)

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marked as duplicate by gertvdijk, Kevin Bowen, Alaa Ali, Eric Carvalho, guntbert Sep 8 '13 at 17:50

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@Braiam Doesn't Ubiquity use parted behind the scenes for partitioning? It makes sense that this message would occur during installation of Ubuntu, even without the OP having manually invoked parted or gparted. – Eliah Kagan Aug 31 '13 at 3:02

You need to have Windows convert the disk back to a basic disk ( in the disk utility ).

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Microsofts offical policy is a full backup, erase dynamic partitions and create new basic partitions. There is no undo. Dynamic volume is a Microsoft proprietary format developed together with Veritas (now acquired by Symantec) for logical volumes. You may be use a third-party tool, such as Partition Wizard MiniTool or EASEUS to convert a convert a dynamic disk to a basic disk without having to delete or format them.

I've never used any of these and so I can't be sure they will work.Be sure to have good backups as any major partition change has risks. Dynamic also on gpt as LDM

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