How to check if USB CDC (COM port) driver is installed

[Sergei Petrov]

I need to check if the driver is already installed, so I can request it in my c++ application if not. I have the driver from silabs, there is .cat, .inf and .exe files. After opening the installer - it just says "Silicon Laboratories. Inc. (usbser) Ports (03/26/2014 6.1.7601.17514) - Ready to use" after confirming the terms, nothing else. I tried searching for "usbser.sys" but nothing found, I also tried search for "USB\VID_1BA4&PID_0002" (which I found in .inf file) and also nothing. What should I look for? This driver should be pre-installed in win 8-10, but what about the older verions?

[Version]
Signature="$WINDOWS NT$"
Class=Ports
ClassGUID={4D36E978-E325-11CE-BFC1-08002BE10318}
Provider=%SILICONLABS%
DriverVer=03/26/2014,6.1.7601.17514
CatalogFile=SiLabs-CDC.cat

[Manufacturer]
%SILICONLABS%=DeviceList, NT, NTAMD64, NTIA64

;------------------------------------------------------------------------------

[DeviceList]
%CDCDEVICE_1BA4_0002%=DriverInstall,USB\VID_1BA4&PID_0002
%CDCDEVICE_2544_0003%=DriverInstall,USB\VID_2544&PID_0003
%CDCDEVICE_10C4_0003%=DriverInstall,USB\VID_10C4&PID_0003
%CDCDEVICE_2544_0008_02%=DriverInstall,USB\VID_2544&PID_0008&MI_02
%CDCDEVICE_10C4_0008_02%=DriverInstall,USB\VID_10C4&PID_0008&MI_02

[DeviceList.NT]
%CDCDEVICE_1BA4_0002%=DriverInstall,USB\VID_1BA4&PID_0002
%CDCDEVICE_2544_0003%=DriverInstall,USB\VID_2544&PID_0003
%CDCDEVICE_10C4_0003%=DriverInstall,USB\VID_10C4&PID_0003
%CDCDEVICE_2544_0008_02%=DriverInstall,USB\VID_2544&PID_0008&MI_02
%CDCDEVICE_10C4_0008_02%=DriverInstall,USB\VID_10C4&PID_0008&MI_02

[DeviceList.NTAMD64]
%CDCDEVICE_1BA4_0002%=DriverInstall,USB\VID_1BA4&PID_0002
%CDCDEVICE_2544_0003%=DriverInstall,USB\VID_2544&PID_0003
%CDCDEVICE_10C4_0003%=DriverInstall,USB\VID_10C4&PID_0003
%CDCDEVICE_2544_0008_02%=DriverInstall,USB\VID_2544&PID_0008&MI_02
%CDCDEVICE_10C4_0008_02%=DriverInstall,USB\VID_10C4&PID_0008&MI_02

[DeviceList.NTIA64]
%CDCDEVICE_1BA4_0002%=DriverInstall,USB\VID_1BA4&PID_0002
%CDCDEVICE_2544_0003%=DriverInstall,USB\VID_2544&PID_0003
%CDCDEVICE_10C4_0003%=DriverInstall,USB\VID_10C4&PID_0003
%CDCDEVICE_2544_0008_02%=DriverInstall,USB\VID_2544&PID_0008&MI_02
%CDCDEVICE_10C4_0008_02%=DriverInstall,USB\VID_10C4&PID_0008&MI_02

;------------------------------------------------------------------------------

[DriverInstall]
Include=mdmcpq.inf
CopyFiles=FakeModemCopyFileSection
AddReg=SerialPropPageAddReg

[DriverInstall.Services]
Include=mdmcpq.inf
AddService = usbser, 0x00000002, DriverServiceInst

[DriverServiceInst]
DisplayName=%SERVICE%
ServiceType=1
StartType=3
ErrorControl=1
ServiceBinary=%12%\usbser.sys

[SerialPropPageAddReg]
HKR,,EnumPropPages32,,"MsPorts.dll,SerialPortPropPageProvider"

;------------------------------------------------------------------------------

[Strings]
SILICONLABS = "Silicon Laboratories, Inc."
CDCDEVICE_1BA4_0002 = "Silicon Labs CDC Serial port"
CDCDEVICE_2544_0003 = "Silicon Labs CDC Serial port"
CDCDEVICE_10C4_0003 = "Silicon Labs CDC Serial port"
CDCDEVICE_2544_0008_02 = "Silicon Labs CDC Serial port"
CDCDEVICE_10C4_0008_02 = "Silicon Labs CDC Serial port"
SERVICE = "USB CDC Serial Port Driver"

Thanks for any informations.

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