What kind of device and operating system is this?

Its a modern Lenovo desktop using Win 11 and Microsoft 365

Do you download it from the web site? thunderbird.net

Yes, but once I get past the donations page, it still says No App to Open files, meaning I believe the Tbird.exe files. I have tried d/loading a fresh copy of WinZip to make sure I have a working Unzipper. I also tried to access the thunderbird.net page from a Lenovo Tablet, got message Nothing to see Here, page not found. I have been using Tbird for many years, now trying to get it to work on two new devices, a desktop and a Tablet, without much success.