Blizzard will stop to support the 32bits version starting on 1rst July. I strongly recommand to everyone to do a Windows update.
More info here: https://xpoff.com/threads/support-ending-for-world-of-warcraft-32-bit-client-this-summer.78242/
More info here: https://xpoff.com/threads/support-ending-for-world-of-warcraft-32-bit-client-this-summer.78242/