I found both in the insider hub as well as elsewhere on the web that many folks are experiencing the "Inaccessible Boot Device" after upgrading from 16199 to 16215 but I've not seen any definitive explanation as to the cause.OS Name: Microsoft Windows 10 Pro Insider Preview
OS Version: 10.0.16215 N/A Build 16215
OS Manufacturer: Microsoft Corporation
OS Configuration: Standalone Workstation
OS Build Type: Multiprocessor Free
Registered Owner: Trouble
Registered Organization: Windows 10 Forums
Original Install Date: 6/8/2017, 11:34:07 PM
System Boot Time: 6/8/2017, 11:46:07 PM
System Manufacturer: MSI
System Model: MS-7592
System Type: x64-based PC
Processor(s): 1 Processor(s) Installed.
[01]: Intel64 Family 6 Model 23 Stepping 10 GenuineIntel ~2936 Mhz
BIOS Version: American Megatrends Inc. V28.10, 4/8/2011
Windows Directory: C:\Windows
System Directory: C:\Windows\system32
Boot Device: \Device\HarddiskVolume1
System Locale: en-us;English (United States)
Input Locale: en-us;English (United States)
Time Zone: (UTC-06:00) Central Time (US & Canada)
Total Physical Memory: 4,095 MB
Available Physical Memory: 2,653 MB
Virtual Memory: Max Size: 5,503 MB
Virtual Memory: Available: 3,968 MB
Virtual Memory: In Use: 1,535 MB
Page File Location(s): C:\pagefile.sys
I found both in the insider hub as well as elsewhere on the web that many folks are experiencing the "Inaccessible Boot Device" after upgrading from 16199 to 16215 but I've not seen any definitive explanation as to the cause.In the spirit of never giving up, I was fortunate in that I had enough in the contents of C:\Windows\SoftwareDistribution\Downloads so that I was able to use UUPtoISO to construct my own ISO for 16215.
Using that I wiped the drive and performed a custom clean install which didn't take all that long and seems to be running rather well.
This was on my old, dedicated insider physical machine, with some pretty primitive specs so I'm not expecting any rocketship like performance, just a physical install to test the builds on.
I found both in the insider hub as well as elsewhere on the web that many folks are experiencing the "Inaccessible Boot Device" after upgrading from 16199 to 16215 but I've not seen any definitive explanation as to the cause.
https://answers.microsoft.com/en-us...ble-boot/182f4e5d-98c1-4673-bce4-00ef23bb499d
I suspect it might have something to do with the size of the system partition again and not being able to grow it during the installation process.
Most of what I see involves newer machines running GPT/UEFI with SSDs. Mine is an old legacy BIOS machine running a old spinner hard disk.
Fortunately I don't run a lot of third party programs nor do I maintain a lot of data on these insider installs so a custom clean install isn't a big deal for me, in fact it's generally preferred although it seems to be getting more and more difficult every time to produce or get your hands on an ISO to perform a clean install.
Downloaded and installed without a problem. It took forever though....
It may be that the installation might just decide to fall on its' face at any random percentage of the install.ADDED 6/9: Some Insiders have reported having their installation of this build getting stuck or hung at around 33%. If this happens to you, you will need to restart your PC and have it rollback to Build 16199 and wait for the next build with a fix.
Did you receive any error messages or a Green Screen of Death?
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