Viber chat run multiple instances
Solution 1:
- Create "NEW" windows account
- Download vibersetup.exe
- Run vibersetup.exe as "NEW" account
- Start new installed viber as "NEW" account from C:\Users\"NEW"\AppData\Local\Viber\
- Register as second phone number
Enjoy
Solution 2:
No way. Currently you can have only one mobile device and one PC for one viber account
Yes, you can! But only if one of the devices is your computer (PC or Mac). Viber Media Inc. launched Viber desktop version in May 2013
http://www.viberfaq.com/can-i-have-same-viber-account-on-two-different-devices/