Windows 10 problem - Partitions are not in the recommended order

Windows 10 installation problem: 
"The partitions on the disk selected for installation are not in the recommended order.  For additional information about installing to GPT disks...."

Symptoms:
You are doing a fresh install, from a Windows 10 ISO image or are installing Windows to an existing hard disk that had an operating system previously installed.

You have selected the (largest) available partition to install, likely the same partition Windows 7 or 8 was previously installed.  Other partitions, such as a ESP partition, are ordered earlier in the list. 

Solution 1 (not recommended, but easy)

A.  During the installation, select the previous Windows 7/8 partition and ignore the error.  Windows will install properly, even with the error.  However, this is not recommend.


Solution 2 (recommended)

Older versions of Windows included a basic partition utility, where you could delete partitions and consolidate the disk.  Windows 10 does not readily expose this feature.  Although you can format partitions, select unallocated space, and other minor features, it will not delete existing partitions.  However, there is an easy, albeit geeky solution.

Obvious caution:  This will erase all partitions on the disk, destroying all data, files and partitions, but you knew this already - you are doing an advanced install and you know what you are doing.



1.  At the Windows 10 Setup "Partition Screen", press Shift-F10.  This opens a DOS prompt.

2.  Type this command:  "diskpart"  (no quotes)

3.  Type "List Disk".

Note which disk is your largest.  This is likely the one where your existing operating system is installed.  If you have SD card slots, they will show in the list.  Ignore them.  For most people, DISK 0 is the disk you care about.



4.  Type "Select Disk=0"  to activate your disk.

5.  Type "List Partition"

-- You could confirm this matches what the Windows Setup screen showed.  My disk looks like this illustration.  In this case, some of the partitions were from Windows 8. When Windows 10 upgraded, it adds its own new partitions rather than risk damaging the older ones.  The space occupied by these is negligible:



6.  Type "Clean"

One command does it all.  There is no warning. 

7.  Type "List Partitions"

- expected results: "There are no partitions on this disk to show"

8.  Type "exit", closing DiskPart
9.  Type "exit", closing the command window

Return to the already-in-progress Windows 10 setup, where the old partitions still show.  Continue with these steps:

10.  Click "Refresh"  

-Note drive 0 shows all "unallocated space", all on one partition.

11.  Click "*new",  Apply, accepting the recommended disk size

12.  Click "OK" on "To ensure Windows features work correctly, Windows might create additional partitions."  Allow it to do so.

Continue with your Windows install

Benefits of the recommended solution

By cleaning the drive, all partitions, including vendor recovery files, prior versions of Windows utility partitions, which are now obsolete, are all erased and you gain back the disk space for your own work.  As the Windows install continues, it will build its own partitions, and these will be in the recommended order for all eternity.
Windows 10 problem - Partitions are not in the recommended order Windows 10 problem - Partitions are not in the recommended order Reviewed by Unknown on 11:22 PM Rating: 5

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