Run Multiple Viber on Windows

Create Local Account on Windows, and login with that account.
Now Download and install viber.
Sync the viber with your Phone (So that the viber on your PC can be opened).
Once the viber Opened, you can now Sign-out from that account.
Go back to your Main Account (the one that you want to run Multiple viber).
Right Click on Desktop and Create Shortcut
Paste the following (Change username only):
C:\Windows\System32\runas.exe /savecred /user:username “C:\Users\username\AppData\Local\Viber\Viber.exe”
Done!