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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
According to the description of the fixes in KB4497935 the bug with the USB devices should have been fixed, but it still does not allow updates with installation media on a USB stick.
Fix description:
"Addresses an issue that may cause an external USB device or SD memory card to be reassigned to an incorrect drive during installation. For more information, see "This PC can't be upgraded to Windows 10" error on a computer that has a USB device or SD card attached"
I tried to do an update with installation media build 18362.145 on a system already at 18362.145 and still gets the error message below:
Is there a fix yet for this bug in the v 1903 release ? Which build do I need to get this bug fixed ?
I know that I can work around the issue installing from a local drive.
Also if I try upgrading from1903 to a preview 20H1 build 18908.1000 using a USB stick the update completes without this message.
I hope we don't need to wait for 20H1 to get this bug resolved.
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
Fine, I made an .iso onto an external HDD. It's smaller than was 1809...
I'll try to run it from there first. If it fails, I'll move it to the internal.
I won't copy it to a USB flash drive for fear some super-hidden file would not go. I'll wait patiently for MSFT to fix its Setup.exe & make a new flash instead. Yes, I agree Pauli O proved it is 1903's Setup.exe at fault.
I've got tons of free space on my internal 1 TB HDD, only about 40 GB is used. Thanks for the vote of confidence on the card reader. I downloaded & printed my Owner's Manual, but would hate to open this computer up.
No need to open the computer, I think the MS explanation of the problem just said to remove the SD card from the reader.
So download the window ISO in a folder on your C: drive, then open it with file explorer and run the setup from there...
If you want to prepare the USB you can format it with FAT32 and then copy all the files and folders from the mounted ISO to the USB stick.
Just remove the USB stick before you start the setup.exe for the upgrade.
Install get past that USB device checking, but then there was some another problems.
Install run OK and restart at the end of that phase continuing with working on updates until first restart at 30% occurred and then it restore to previous version.
Now I'm restoring dual boot image with 2x17763 to SSD and continue testing with faster disk. HDD goes back to backup disk.
Probably it didn't like mixing stuff from 1809 and 1903 on the installation media, but for sure the trap for the USB must be in the installer, which needs to be fixed in a new ISO update for 1903.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(198.4, 2%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPO%3C/text%3E%3C/svg%3E)
Install get past that USB device checking, but then there was some another problems.
Install run OK and restart at the end of that phase continuing with working on updates until first restart at 30% occurred and then it restore to previous version.
Now I'm restoring dual boot image with 2x17763 to SSD and continue testing with faster disk. HDD goes back to backup disk.
I've got tons of free space on my internal 1 TB HDD, only about 40 GB is used. Thanks for the vote of confidence on the card reader. I downloaded & printed my Owner's Manual, but would hate to open this computer up.
