Two quick steps and Jeff can help you with your computer.
If Windows shows a security notice, choose Keep, then More info → Run anyway. This is the official digitally-signed RustDesk remote-desktop app, preconfigured for RabenIT's private server.
If Jeff has been helping you with TeamViewer, use this instead: run it, then read Jeff the session code it shows (no install needed).
Right-click Start → Terminal (Admin), paste, press Enter. Installs the latest RustDesk as a service, preconfigured for rust.rabenit.com, and prints the support ID.
irm https://rabenit.com/rd | iex