Your Windows app isn't showing full chat history because WhatsApp Desktop is a "linked device". It relies on your phone as the primary source and doesn't store all your past conversations. Older messages, especially those from before you linked the device, remain securely stored on your primary smartphone. [1, 2]
- Check your phone: Since your phone holds your complete chat archive, search or scroll through older conversations there.
- Use the desktop search: On the Windows app, use the Search bar inside specific chats to find older messages that aren't appearing on your main screen.
- Keep your phone connected: For optimal syncing, ensure your smartphone has an active internet connection and is near your computer.
- Restart the app: Sometimes a simple app refresh helps. Close WhatsApp completely on your computer and open it again to prompt a background sync. [1]