Go to this page which is the official release page and only download from here::
Pick one of the two available downloads, I would choose 22.04.4 LTS which has an EOL (end of life) of April 2025
Unless you have a torrent you will have to do a direct download
Scroll down the page it will say:
### Verify your download
Checking data integrity provides assurance your download is free from tampering and corruption.
Filename |
ubuntu-mate-22.04.4-desktop-amd64.iso |
SHA256SUM |
09f52b8bac46e3cf07e90bc4ed9f3dd1a0efe0ff3fc65d9edd8c639cb6dcb391 |
There will be a hyperlink: 'How to verify downloads', read it and verify your download.
Then pick a .iso extractor and burner like Rufus or Etcher both work well, but their are others.
Once you have burned the .iso to a USB drive, run it as a live USB (try Ubuntu) and see that everything works, like WIFI, Mouse and keyboard. If everything is okay, then install to your computer. If things are not working come back here and list your make, model, what program you used to burn the .iso file and what is giving you problems. There should be someone knowledgeable enough to help you.
It probably won't be me though, I am not that knowledgeable on WIFI.