In the basic version of Dell there should be only 2 unknown devices in Device Manager.
If drivers won’t install automatically you have to install it manually choosing any .inf file from driver directory.
The first one is O2 Micro OZ600xxx Memory Card Reader DriverPCI\VEN_1217&DEV_8331&SUBSYS_049B1028&REV_05
PCI\VEN_1217&DEV_8331&SUBSYS_049B1028
PCI\VEN_1217&DEV_8331&CC_018000
PCI\VEN_1217&DEV_8331&CC_0180
Download driver for Windows 10 (DRVR_WIN_R300787.EXE – it works on win10):
http://www.dell.com/support/home/us/en/555/Drivers/DriversDetails?driverId=KC9W0&fileid=2731102815
and unpacked version:
http://www.mediafire.com/download/v1hc9ss8kpoafte/O2+Micro+OZ600xxx+Memory+Card+Reader+Driver.zip
The second unknown device is ST Microelectronics Free Fall Sensor:ACPI\VEN_SMO&DEV_8800
ACPI\SMO8800
*SMO8800
Tested driver on Windows 10 (Chipset_Driver_RCHTX_WN_2.00.10.34_A11.EXE):
http://www.dell.com/support/home/pl/pl/plbsd1/Drivers/DriversDetails?driverId=RCHTX&fileId=3100839469&osCode=WW1&productCode=latitude-e5420&languageCode=PO,EN&categoryId=CS
and extracted driver:
http://www.mediafire.com/download/w9pvzxa4tsfzx6w/STMicroelectronics.zip
07.08.2015 at 15:41
you also have to download Audio drivers from DELL website as without them, builtin microphone will be not discovered and installed.
14.10.2016 at 03:15
Thanks very much for supplying this information, I had two unknown devices on my E5420 and the links you gave were exactly the drivers needed for my system.
23.02.2017 at 23:19
great – worked forme too!
07.10.2019 at 13:13
The driver does not work on Windows 10 Home 64bit, build 1903. It installs properly, it did vanish from unknown devices, however it doesn’t display in computer window, nor as a drive.