Check IP, DNS,Subnet
      Change to available IP
      Reinstall Viber and Chrome both PC and Company Tablet.
      Temporarily disable windows firewall and AV.
      Reinstall Back Office Network Driver.
      Run System Restore to the last known working date.
      Reboot Access Point
      Reboot SDWAN Circuit located at M&S Glorietta.
(Coordinated to infra for further support )