@Kevin_Z it's a AX73 and yes it's the original power adapter. The routeur don't reboot without being uses. That why i'm talking about "depening the service" Me and my girlfriend are working at home...

@Kevin_Z Adding my 2 cents on this issue....I got this issue but it depend on the services used. Exemple, if i use my chromecast for netflix, the router will reboot. Netflix on my phone or computer...