Here is a detailed step by step process to manually install the Drivers in your system :

Step 1 : Click on ‘Update Now’ to update the selected Driver.

Step 2 : Select ‘Update Manually’ and click on ‘Continue’ to download the latest driver

Step 3 : The latest Driver will start downloading instantly which might take a few minutes. After download completion, you will be automatically redirected to the next screen.

Step 4 : Select ‘Install Manually’ and click on ‘Continue’ to manually install the downloaded Driver on your PC. Clicking on the button will take you to the Win Riser > DrvDownload folder.

Step 5 : Click on the downloaded Driver’s file in the Win Riser > DrvDownload folder and launch the installed .exe file.

In case of a Zip File, You can extract and install the necessary driver for installation.

You can install driver manually by using PNPUtl.exe which we can found in %windir%\system32. Please follow the instructions from link to use PNPUtil to add/delete the new driver.