Microsoft Corporation 252,75 +4,94 +1,99% has been warning since September 2022 Windows 10 users the 21H1 (May 2021) build would no longer be supported/serviced as of today’s Patch Tuesday. If you are unsure which build of Windows 10 (or even 11) you are running you can open the run prompt (WinKey+R) and type winver in the open field and press enter. If you are still running Windows 10 21H1, you should be able to update to 22H2 via Windows Update.
“To help keep you protected and productive, Windows Update will automatically initiate a feature update for Windows 10 consumer devices and non-managed business devices that are at, or within several months of reaching end of servicing,” Microsoft said.
“This keeps your device supported and receiving monthly updates that are critical to security and ecosystem health. For these devices, you will be able to choose a convenient time for your device to restart and complete the update.”