@passegua, sorry for the delay, but the solution to the problem is this: Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOT\whatsapp] "URL Protocol"="" @="URL:whatsapp" [HKEY_CLASSES_ROOT\whatsapp\shell] [HKEY_CLASSES_ROOT\whatsapp\shell\open] [HKEY_CLASSES_ROOT\whatsapp\shell\open\command] @="\"C:\\Users\\wigny\\AppData\\Local\\WhatsApp\\WhatsApp.exe\" \"%1\"" Create a .reg file with that content, but replace the wigny user with your user, and it will work.