Urgently install Windows security updates.
A fatal security vulnerability in Windows (all versions, including Windows servers) allows to attack your computer from the Internet, if you have not installed the latest security updates. If you type "Update" in the start bar, you should get displayed "You are up to date", "Last check today". If you have a different display, select "Check for updates". Bypass any updates offered, even if a reboot is required. Do not use Windows versions at the TU that are no longer supplied with updates.
The end of supply dates for updates for Windows 10 and 11 versions can be found here: https://endoflife.date/windows.
Background: https://blog.fefe.de/?ts=9ae6e3ea