Question Error when updating an old Windows Tablet to Android

COTSWOLDMARK

New member
Mar 27, 2026
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Hi Forum, I'm new to Android, and was looking to update an old HP Stream 7 tablet with Android to breathe some new life into it (it's super slow with Win 10)
I downloaded the iso image for Android 5.1 which seems to be the recommended version for this older device. I used the x86 version of Rufus to create a boot file using my USB drive.
However when I connect the USB drive via my OTG adapter and try booting from it, I get the error "The Selected Boot Device Failed".
I've switched off secure boot on the tablet.
Does anyone have any other recommendations on what I could try?
Thanks in advance!
 

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