I have had several failures to upgrade.
I am running Windows 7 SP1 on a Dell XP8500.
I have recently installed a SSD to use as my main drive with the original as data store.
Bought ViewSonic touch screen monitor specially for Windows 10.
The most recent attempt gave the most information.
error...
common issues
dellxp8500
error 0xc1900101
error reporting
failure
home pc
installation
migration
ssd
sysprep
tech support
touchscreen
troubleshooting
update
upgrade
user experience
windows 10
windows 7 sp1
windows vista