Try this:
Switching to the Computer’s Dedicated GPU:
https://support.ubisoft.com/en-gb/faqs/000027100/Switching-to-the-laptop-s-dedicated-GPU/
Do it for this file:
?:\Warcraft III\ _retail _\x86_64\BlizzardBrowser\ BlizzardBrowser.exe
Try this:
Switching to the Computer’s Dedicated GPU:
https://support.ubisoft.com/en-gb/faqs/000027100/Switching-to-the-laptop-s-dedicated-GPU/
Do it for this file:
?:\Warcraft III\ _retail _\x86_64\BlizzardBrowser\ BlizzardBrowser.exe