Intel Dual-Band 8260AC PCIe not found in Win10, found in Ubuntu

TL;DR Ubuntu finds and uses a PCIe Wifi card just fine, but Windows can't find it. (Apparently needs USB header connection on MB?)

Long Version:
I use a PCIe card with the Intel Dual Band 8260AC chipset. The interesting part is that it has a USB 2.0 header on it that you're supposed to plug into a header on the MB. I had it installed this way previously and it was working fine til last night. I upgrade my CPU/MB/RAM, but the new MB is one USB 2.0 header short. The old MB had 3, all filled, but the new MB has only 2 USB 2.0 headers and 1 USB 3.0 header, so one device is left out. I decided to leave the wifi card plugged into the PCIe slot, but not plugged into a MB header and fire it up and make sure everything else was working.

No surprise, but I had no wifi. Figured maybe a new driver might solve the issue as it seems weird to need both a PCIe slot and a USB connection. So I dug out a USB wifi dongle I had and proceeded to update/install every possible driver, BIOS, etc. for the new MB and the wifi card. Still nothing.

Just out of curiosity I rebooted into Ubuntu (latest 17.10), and voila! Wifi worked! I removed the USB dongle just to make sure, but it definitely works just fine in Ubuntu, but Windows 10 cannot find the device. This is without the USB connection BTW. I've installed and reinstalled the driver, but no dice.

Any thoughts on getting Windows to recognize the card without the USB header connected? And any thoughts on why Ubuntu can find and use the device just fine while Windows seems unable to?

Huh. So it seems Windows doesn't recognize it even with the USB header plugged in. This is annoying.

The USB header is only used for Bluetooth.

Do you see any unknown devices in Device Manager?

Ah, gotcha. No, no unknown devices. Last night I had to manually install drivers the old fashioned way with "Add legacy hardware".

Update:
Manually installed drivers again as per above. Device Manager gives me this:
"This device is not working properly because Windows cannot load the drivers required for this device. (Code 31)


The request is not supported."

Can you run SIV (SIV - System Information Viewer), click on PCI Bus, and copy+paste the contents here?

Code:

[PCI Bus] <- SIV64X - System Information Viewer V5.25

Bus-Numb-Fun  IRQ  Vendor-Dev-Sub_OEM-Rev Class (59:127)             Vendor and Device Description  Showing 26 of 26

[0 - 00 - 0]       8086-5904-07A01028-03 Host Bridge                 Intel Core i7 Host Bridge/DRAM Controller
[0 - 02 - 0]       8086-5926-07A01028-06 VGA Controller              Intel Core i7 GT3e Integrated Graphics Controller [GPU-0]
[0 - 04 - 0]  16   8086-1903-07A01028-03 Other DPIO Module           Intel Skylake Processor Thermal Subsystem
[0 - 20 - 0]       8086-9D2F-07A01028-21 XHCI Controller             Intel Skylake-U/Y USB 3.0 xHCI Controller
[0 - 20 - 2]       8086-9D31-07A01028-21 Other DPIO Module           Intel Skylake-U/Y Thermal Subsystem
[0 - 21 - 0]  16   8086-9D60-07A01028-21 Other DPIO Module           Intel Skylake-U/Y LPSS: I2C Controller #0
[0 - 21 - 1]  17   8086-9D61-07A01028-21 Other DPIO Module           Intel Skylake-U/Y LPSS: I2C Controller #1\
...

Can you also post the output of lspci in Ubuntu?

Yes. I'll need a minute before I reboot. Working on reactivating Windows after all the hardware changes too.

If it's useful, I found a tool called PCI-Z. Results attached.

Code:

Motherboard: MSI Z170A PC MATE (MS-7971) (BIOS version: A.E0)
Processor: Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz, 8 logical CPUs
Available memory (MB): 16345
Operating system: Microsoft Windows 10
Computer name: BAMBAM10	User name: benja
Display controller	Advanced Micro Devices, Inc. [AMD/ATI]	Juniper XT [Radeon HD 6770]		VGA compatible controller	1002:68BA 1043:03FE
Serial bus controller	Intel Corporation	Sunrise Point-H USB 3.0 xHCI Controller		USB controller	8086:A12F 1462:7971
Serial bus controller	Intel Corporation	Sunrise Point-H SMBus		SMBus	8086:A123 1462:7971
Network controller	Realtek Semiconductor Co., Ltd.	RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller		Ethernet controller	10EC:8168 1462:7971
Bridge	Intel Corporation	Sunrise Point-H PCI Express Root Port #11		PCI bridge	8086:A11A 1462:7971
Bridge	Intel Corporation	Intel Kaby Lake Host Bridge		Host bridge	8086:591F 1462:7971
Bridge	Intel Corporation	Sunrise Point-H PCI Express Root Port #7		PCI bridge	8086:A116 1462:7971
Bridge	Intel Corporation	Sunrise Point-H LPC Controller		ISA bridge	8086:A145 1462:7971
Signal processing controller	Intel Corporation	Sunrise Point-H Thermal subsystem		Signal processing controller	8086:A131 1462:7971
Communication controller	Intel Corporation	Sunrise Point-H CSME HECI #1		Communication controller	8086:A13A 1462:7971
Bridge	Intel Corporation	Sunrise Point-H PCI Express Root Port #1		PCI bridge	8086:A110 1462:7971
Bridge	Intel Corporation	Sunrise Point-H PCI Express Root Port #9		PCI bridge	8086:A118 1462:7971
Signal processing controller	Intel Corporation	Sunrise Point-H Serial IO I2C Controller #1		Signal processing controller	8086:A161 1462:7971
Generic system peripheral	Intel Corporation	Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model		System peripheral	8086:1911 1462:7971
Signal processing controller	Intel Corporation	Sunrise Point-H Serial IO UART #0		Signal processing controller	8086:A127 1462:7971
Mass storage controller	Intel Corporation	Sunrise Point-H SATA controller [AHCI mode]		SATA controller	8086:A102 1462:7971
Bridge	Intel Corporation	Sunrise Point-H PCI Express Root Port #3		PCI bridge	8086:A112 1462:7971
Serial bus controller	ASMedia Technology Inc.	ASM1142 USB 3.1 Host Controller		USB controller	1B21:1242 1462:7971
Bridge	Intel Corporation	Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16)		PCI bridge	8086:1901 1462:7971
Multimedia controller	Advanced Micro Devices, Inc. [AMD/ATI]	Juniper HDMI Audio [Radeon HD 5700 Series]		Audio device	1002:AA58 1043:AA58
Bridge	Intel Corporation	Sunrise Point-H PCI Express Root Port #12		PCI bridge	8086:A11B 1462:7971
Memory controller	Intel Corporation	Sunrise Point-H PMC		Memory controller	8086:A121 1462:7971
Multimedia controller	C-Media Electronics Inc	CMI8788 [Oxygen HD Audio]	Virtuoso 100 (Xonar D1)	Multimedia audio controller	13F6:8788 1043:834F
Signal processing controller	Intel Corporation	Sunrise Point-H Serial IO I2C Controller #0		Signal processing controller	8086:A160 1462:7971
Bridge	ASMedia Technology Inc.	ASM1083/1085 PCIe to PCI Bridge		PCI bridge	1B21:1080 0000:0000

Ubuntu results:

Code:

00:00.0 Host bridge: Intel Corporation Device 591f (rev 05)
00:01.0 PCI bridge: Intel Corporation Skylake PCIe Controller (x16) (rev 05)
00:08.0 System peripheral: Intel Corporation Skylake Gaussian Mixture Model
00:14.0 USB controller: Intel Corporation Sunrise Point-H USB 3.0 xHCI Controller (rev 31)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-H Thermal subsystem (rev 31)
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-H Serial IO I2C Controller #0 (rev 31)
00:15.1 Signal processing controller: Intel Corporation Sunrise Point-H Serial IO I2C Controller #1 (rev 31)
00:16.0 Communication controller: Intel Corporation Sunrise Point-H CSME HECI #1 (rev 31)
00:17.0 SATA controller: Intel Corporation Sunrise Point-H SATA controller [AHCI mode] (rev 31)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #1 (rev f1)
00:1c.2 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #3 (rev f1)
00:1c.6 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #7 (rev f1)
00:1d.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #9 (rev f1)
00:1d.2 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #11 (rev f1)
00:1d.3 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #12 (rev f1)
00:1e.0 Signal processing controller: Intel Corporation Sunrise Point-H Serial IO UART #0 (rev 31)
00:1f.0 ISA bridge: Intel Corporation Sunrise Point-H LPC Controller (rev 31)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-H PMC (rev 31)
00:1f.4 SMBus: Intel Corporation Sunrise Point-H SMBus (rev 31)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Juniper XT [Radeon HD 6770]
01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Juniper HDMI Audio [Radeon HD 5700 Series]
03:00.0 USB controller: ASMedia Technology Inc. ASM1142 USB 3.1 Host Controller
04:00.0 Network controller: Intel Corporation Wireless 8260 (rev 3a)
06:00.0 PCI bridge: ASMedia Technology Inc. ASM1083/1085 PCIe to PCI Bridge (rev 03)
07:00.0 Multimedia audio controller: C-Media Electronics Inc CMI8788 [Oxygen HD Audio]
08:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)