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If you have upgraded from windows 7 to 10 then follow below steps to rollback to windows 7
To roll back your Windows 10, go to your PC Settings, by typing Settings in the taskbar search bar, next to the Windows icon, and clicking on Settings. It will open the PC Settings. Select ‘Update and Security’.
The Update and Security option opens. Here you will see options like Windows Update, Activation, Backup, Recovery and Windows Defender. Click on ‘Recovery‘.
This will open the Recovery settings window for your PC. You will see 3 options:
Click on ‘Go back to previous version of Windows’. In this case you see Go back to Windows 7
Let me know how it goes