Avoid "driver download" websites offering executable files—they often contain malware.
Do you have the from the back of your device so I can help you find the exact utility software? SilverCrest SWS 150 A1 mode d'emploi - ModesdEmploi.fr silvercrest sws 150 a1 driver download
Now plug in the weather station via USB. Turn on the device (ensure it has fresh batteries or power). Windows should now detect it and automatically assign a COM port (e.g., COM3, COM4). silvercrest sws 150 a1 driver download