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<@978362701682192456> Please forget Telnet!
When you created the Raspberry Pi OS on your SD card (Bake your Pi) what hostname did you enter?
Open a "Command Prompt" on your Windows computer and type ping <hostname of your Pi>.
If you get a reply, open putty (I assume you have installed it) and start a new session of the type ssh and as IP/Host name type in the name you gave your Raspberry Pi and press enter.