I need help installing the Windows software for QM1598 Pro Sound Level Meter with Calibrator

Make sure you are logged on as an administrator before downloading and installing the software.

Extract the downloaded software to a folder (right click the Zip, choose Extract All).

Run the software installer from the software's root folder. Click Next until it finishes.

Press Windows and X keys on your keyboard and choose Device Manager from the list. 

Find the CP2102 USB device in the list, double-click it, and press Update Driver.

Choose Browse My Computer for Drivers and navigate to the folder you extracted from the download.

Go to the USBDrivers folder and click to select the folder for your version of Windows (Win10 driver works for Win11)

Press Open and complete the driver installation. You should end up with a new port like this:

Open the Sound Meter software

Click Com Port (C), then Manual (M), choose the specific COM port number your system installed, and press OK.

If you are experiencing a runtime error, your PC may be missing the Visual C++ Runtime or does not have the CP2xx drivers installed. The runtime is available from here: https://docs.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist?view=msvc-170