Try connecting to another internet source. If you are using VPN, please disable it and download the 7.1 Surround Sound here. I’ll wait for your confirmation.

Thanks for your reply. Currently i have no other option but 1 and only network source ( wifi hotspot from my phone).

I've downloaded the same software from your link, but stuck at downloading the main application step ( 0/93mb - then unable to download screen).

Are you using a personal computer or a company provided? If it is feasible, please replicate the issue by installing the 7.1 Surround Sound to another computer as there could’ve been a restriction in it. Otherwise, try going to Windows Safe Mode with Networking by following the steps below:

1. Click the Windows button On/Off.
2. Hold down the Shift key and click Restart.
3. Click the option Troubleshoot and then Advanced options.
4. Afterward, go to “Advanced options” and click Start-up Settings.
5. Under “Start-up Settings”, click Restart.
6. Select "Enable Safe Mode with Networking" from the boot options.