Update n-series-amd-driver-setup.md

Author: vikancha-MSFT-zz

articles/virtual-machines/windows/n-series-amd-driver-setup.md

@@ -32,11 +32,14 @@ For basic specs, storage capacities, and disk details, see [GPU Windows VM sizes
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 | Windows 10 EVD - Build 1903 <br/><br/>Windows 10 - Build 1809<br/><br/>Windows Server 2016<br/><br/>Windows Server 2019 | [20.Q1.1](https://download.microsoft.com/download/3/8/9/3893407b-e8aa-4079-8592-735d7dd1c19a/Radeon-Pro-Software-for-Enterprise-GA.exe) (.exe) |
 
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 ## Driver installation
 
 1. Connect by Remote Desktop to each NVv4-series VM.
 
-1. Download and extract the driver setup files. Navigate to the folder and run 'setup.exe' to install the supported driver for your Windows operating system.
+2. If you are a NVv4 preview customer then first uninstall the previous preview driver by running "amdcleanuputility-x64.exe" located at the folder where the driver setup files are "...\Radeon-Pro-Software-for-Enterprise-19.Q4.1-TP\AMDCleanUninstallUtility"
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+2. Download and install the latest driver.
 
 ## Verify driver installation