The same situation happened to me I bought a powerful laptop, but didn’t have enough money for a license. I also struggled with the view mode in Word until someone recommended kmspico which is really the most reliable method right now. It creates a local server on your computer, and Windows thinks that it is officially activated on a corporate network. I ran it once and forgot about it. The message disappeared, I customized the window colors, and the software works without restrictions. I’ve been updating through the official update center for six months now, and the license hasn’t expired. If you want everything to work and not catch viruses on dodgy websites, this is it. Good luck with the setup.