Como sempre, na FAQ do Windows 10 :
Why don’t I have the Get Windows 10 app?
If you don’t see the Get Windows 10 app on your PC, it might be because:
- Your device isn’t up-to-date with at least Windows 7 SP1 or Windows 8.1 Update.
- Windows Update is turned off or is not set to received updates automatically.
- You’ve blocked or uninstalled the necessary Windows Update functionality.
- Your device is not running genuine Windows.
Running Windows Update and installing any available updates will fix the first three issues. Need more help? Go to our Windows Community Forum.
PCs that we determine cannot run Windows 10 will not see the Get Windows 10 app before July 29, 2015. After July 29, 2015, we’ll enable the icon in the system tray. This is to help ensure that you can easily check your PC’s compatibility if you choose.
If your device is managed as part of a school or business network, please check with your IT administrator about upgrading to Windows 10.
Informações adicionais são uma cortesia da esta questão da Comunidade MS :
Se você achar que nenhuma das condições listadas acima se aplica a você e ainda não está vendo o ícone, também pode tentar executar a solução abaixo, que verificará se seu dispositivo atende a todos os pré-requisitos e, em seguida, na aplicação Obter o Windows 10 :
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Copie o seguinte texto e cole-o no bloco de notas:
REG QUERY "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\UpgradeExperienceIndicators" /v UpgEx | findstr UpgEx if "%errorlevel%" == "0" GOTO RunGWX reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Appraiser" /v UtcOnetimeSend /t REG_DWORD /d 1 /f schtasks /run /TN "\Microsoft\Windows\Application Experience\Microsoft Compatibility Appraiser" :CompatCheckRunning schtasks /query /TN "\Microsoft\Windows\Application Experience\Microsoft Compatibility Appraiser" schtasks /query /TN "\Microsoft\Windows\Application Experience\Microsoft Compatibility Appraiser" | findstr Ready if NOT "%errorlevel%" == "0" ping localhost >nul &goto :CompatCheckRunning :RunGWX schtasks /run /TN "\Microsoft\Windows\Setup\gwx\refreshgwxconfig"
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Salve o arquivo como "ReserveWin10.cmd" ( com aspas, o nome pode ser qualquer coisa).
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Abra um prompt de comando elevado (admin) e execute o arquivo no local em que você o salvou. Por exemplo:
C:\Temp\ReserveWin10.cmd
O script será executado até que tenha uma resposta.
De link
The Microsoft Compatibility Appraiser can take 10 – 30 minutes to run, during which the script will continuously provide status reports that it is running. Please be patient.
If the script is failing in an infinite loop, then you don’t have the necessary prerequisite Windows Updates. Besides requiring Windows 7 SP1 or Windows 8.1 Update, you must also have installed:
For Windows 7 SP1:
KB3035583
KB2952664
For Windows 8.1 Update:
KB3035583
KB2976978