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Hi there,
I am currently helping a friend with an old Lenovo Idea Pad Z710. Made a clean, new installation of Win 10 on a fresh partitioned and formatted hard drive. We had four Unknown devices in Device Manager and solved two of them by installing related old Dell drivers. Two to go.
Lenovo's SupportAssist or Lenovo Update can't solve it, nor Intel or Windows update. Lenovo's support community didn't give me enough help either.
1st devide is an Unknown device
Device type: Other
Manufacturer: Unknown
Location: Port_#0008.Hub_#0003
Driver not installed (code 28)
Information
Path to device: USB\VID_8087&PID_07DC\5&ECB7860&0&8
Hardware ID: USB\VID_8087&PID_07DC&REV_0001and USB\VID_8087&PID_07DC
Compatible ID: USB\Class_E0&SubClass_01&Prot_01, USB\Class_E0&SubClass_01 and USB\Class_E0
...
Name on physical device: \Device\USBPDO-7
...
2nd device is a SM buss controller
Device type: Other
Manufacturer: Unknown
Location: PCI 0, enhet 31, funktion 3
Driver not installed (code 28)
Information
Path to device: PCI\VEN_8086&DEV_8C22&SUBSYS_397817AA&REV_05\3&11583659&0&FB
Hardware ID: PCI\VEN_8086&DEV_8C22&SUBSYS_397817AA&REV_05, PCI\VEN_8086&DEV_8C22&SUBSYS_397817AA, PCI\VEN_8086&DEV_9CA2&CC_0C0500 and PCI\VEN_8086&DEV_9CA2&CC_0C05
Compatible ID: PCI\VEN_8086&DEV_8C22&REV_05, PCI\VEN_8086&DEV_8C22, PCI\VEN_8086&CC_0C0500, PCI\VEN_8086&CC_0C05, PCI\VEN_8086, PCI\CC_0C0500 and PCI\CC_0C05.
BIOS device name: \_SB.PCI0.SBUS
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hello can you try this one...
Recommended Resolution
Reinstall the device driver manually
From Start, search for device manager and select Device Manager from the results.
Right-click the device in the list.
Select Uninstall from the menu that appears.
After the device is uninstalled, choose Action on the menu bar.
Select Scan for hardware changes to reinstall the driver.
Note You may be prompted to provide the path of the driver. If you are asked for the driver and you do not have it, you can try to download the latest driver from the hardware vendor’s website.

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