XPS 15Z Windows 8 unknown device on PCI Express Root Complex

Hi, I have a Dell XPS 15Z, which I bought off a friend. They have recently updated to Windows 8 and now, that's what I have. But when I go into my sound drivers telling me I have an unknown driver. some online solutions responded to my questions even though some came close. So, here's what I know:

Unknown device

Type of device: other devices

Manufacturer: unknown

Location: on PCI Express Root Complex

Hardware ID:



* SMO8800

I don't know if it's related, but my laptop also does not load. I just bought a new AC adapter to replace the one I had, and it is not yet supported. The light flashes red 4 - 5 times and blue/green once. Ive looked online to see what the problem is, but I can't do some of the patches that the computer is at 0% battery.


The hardware ID, it is the free fall sensor:

Windows 8.1 driver is here: http://downloads-us.dell.com/FOLDER01687839M/2/FreeFallSensor_ST%20Microelectronics_W814_A00_setup-FMMHJ_ZPE.exe

The Windows 8.0 driver is here: http://downloads-us.dell.com/FOLDER00951951M/6/FFS_ST_W78_A00_Setup-KT7XG_ZPE.exe

Tags: Dell Software

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