ASRock Fatal1ty B450 Gaming ITX/ac keeps waking up

Hello,

My ASRock Fatal1ty B450 Gaming ITX/ac keeps waking up from sleep. I have tried pretty much everything. When I run a "power cfg -lastwake" in cmd, I get the following:

C:\Users>powercfg -lastwake
Wake History Count - 1
Wake History [0]
Wake Source Count - 1
Wake Source [0]
    Type: Device
    Instance Path: PCI\VEN_1022&DEV_43D5&SUBSYS_43D01849&REV_01\4&288c77c7&0&000B
    Friendly Name: AMD USB 3.10 eXtensible Host Controller - 1.10 (Microsoft)
    Description: USB xHCI Compliant Host Controller
    Manufacturer: Generic USB xHCI Host Controller

There is nothing connected to this USB port. I even made sure to go into Device Manager for this AMD USB 3.10 eXtensible Host Controller - 1.10 (Microsoft) - and in the Power Management tab I made sure to uncheck-box the "Allow this device to wake the computer." And I even check-boxed the "Allow the computer to turn off this device to save power. It still wakes up from sleep randomly, many times.

When I run a "powercfg -devicequery wake_armed" in cmd I get the following (to see a list of devices that can wake up my computer from sleep mode):

C:\Users>powercfg -devicequery wake_armed
HID Keyboard Device
HID Keyboard Device (001)
HID Keyboard Device (002)
HID Keyboard Device (003)
HID Keyboard Device (004)

I know it shows many keyboard devices, but that's just the way my gaming keyboard works. I know for a fact that it is not my keyboard causing the motherboard to wake up. This is because the issues was happening before I even purchased this gaming keyboard (I had a standard normal Kensington, and Dell keyboard).

Can you please please help me with this. I have search this forum and many other forums, and many other people have this issue. Some might have resolved it but never posted the solution, or it was a solution that I already tried that did not work for me.

Thanks,
ggee