USB Relay Modules

Why there is no .sys or .exe file in the Windows driver package?

You may notice that the driver package does not come with a .sys or .exe file as most driver packages do and is expected to be that way. The driver binary necessary in this case is shipped with all copies of windows Desktop/Server editions and gets installed automatically while Windows is installed for the first time. The .inf and .cat files present in the driver package downloaded from merely associate this pre-existing driver with the attached Numato Lab device .