Run the installer. If you encounter a "Not a valid Win32 application" error, you may need to ensure your XP is updated to Service Pack 3 (SP3) [4]. Important Compatibility Notes
Send photos, stickers, and group messages just like the mobile app [3].
You must have Viber activated on a smartphone first. The PC version acts as a secondary device and requires a QR code scan or a secondary activation code sent to your phone [3]. viber pour pc windows xp top
Messaging from a full keyboard while keeping conversations updated on your mobile device [3].
Using older versions of software on an unsupported OS like XP carries security risks. It is recommended to use this setup behind a strong firewall [5]. Run the installer
The "top" versions for XP (typically version 6.0 or earlier) offer a streamlined experience:
Because Viber uses centralized servers, there is always a possibility that Rakuten may eventually disable the backend protocol for these older versions [2]. Sources: OldVersion.com - Viber History Rakuten Viber Support - System Requirements Viber Official - Desktop Features Microsoft TechNet - XP SP3 Compatibility Norton - Risks of Legacy Operating Systems You must have Viber activated on a smartphone first
Since the official Viber website only hosts the latest version, you must source a "legacy" installer (often an .exe file around 30-40MB).