Also which version UBT tried
2.0.1.15
2.08
2.20
Uninstall all version and there drivers
Even desktop shortcuts
Then re install only one version
And drivers..
Also
If you can boot to Android recovery
Wipe cache
Wipe data /factory reset
Also can apply update from external
OTA upgrade on sd or usb
Or twrp
If you can get to Android recovery?
Happy Testing
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