Tried upgrading Windows 7 Home Premium several times, but kept getting error "something happened", "windows 10 installation failed" while using ISO, and behind icon was message about graphic card not meeting requirements. I removed driver to get standard, no help, removed extension, no help, renamed json, no help. Got a tip from other virtual environment and finally was able to upgrade.
First i did run a bat-file to fix missing keys on the registry. (link to be followed, there is a bat, you can edit it if you think it's a hoax), then checked few values, and ofcourse one was missing so i did create it, and 2 had value "red" so i changed them to "green". One more step, to create new json-file with proper code on it. Still couldn't upgrade with ISO, but behind icon it worked just fine (bat-script also gives that icon if missing)
First I did run a bat on the windows 7 to be upgraded. There is menu, first should run option 1 to check that windows has proper updates. Then option 4 so that registry values are included in the registry
halminen.fi/win10fix_full.bat
2 Registry to check:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\UpgradeExperienceIndicators
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\UpgradeExperienceIndicators\Reduced
under both there should be string called UpgEx and UpgExU and value of each must be "Green"
And last thing to check, the file: C:\Windows\AppCompat\Appraiser\Telemetry\Appraiser.JSON should have content like this:
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{
"JsonSuccessfullyWritten" : true,
"JsonVersion" : 3,
"JsonCreationTime" : "130800491614668440",
"CompatSectionCount" : 0,
"CompatSections" :
[
]
}
When all that was done, i first tried to install from already downloaded iso, but it filed exactly as always. Then i hit the icon, and it said that windows 10 is already loading. Waited until it was loaded and then proceeded to upgrade. Everything went just fine. Now i finally have upgraded Windows 10
(and just have to add, if you are not familiar with windows registry, be extra careful, what ever is done there really is done right away. It won't ask if you want to save)