is almost universally recognized as an installer for USB-to-UART bridge drivers , specifically those manufactured by Silicon Labs (SiLabs). The "CDM" in the filename stands for "Composite Device Manager" or "Communication Device Manager" (often referred to as VCP – Virtual COM Port).
This is a frequent issue if Windows automatically overwrites the driver with a newer version, or if you are using a non-genuine FTDI chip. Cdm20830 -setup.exe Download
And there it is: cdm20830-setup.exe (usually 4.2 MB to 6.8 MB). No version notes. No digital signature from a major authority like Microsoft or Apple. Just a stark file link. is almost universally recognized as an installer for