To uninstall the Nvidia driver from Windows 7, first, open the Control Panel and click on 'Program.' Now, choose 'Add or remove Programs' and then click the 'Programs and Features.' Then select the Nvidia application and click on the 'Uninstall' button. Now you need to download and install the older version of an NVIDIA driver manually. If you want to know how to rollback Nvidia game ready driver Windows 7 without uninstalling the driver, then you can do it from the Windows Device Manager. Then open the properties of 'Display adapters' and select 'Nvidia device,' and open its 'Properties' and select 'Roll Back Driver' to revert to the previous driver.
for more info: https://printeranswers.com/roll-back-nvidia-drivers-on-windows-10/