Fatal1ty Z370 Gaming-ITX/ac - USB Issues

I've got a Fatal1ty Z370 Gaming-ITX with a 8700K (Not overclocked)
Everything has been running perfectly, I decided to do a clean install of Windows 10 (Build 1903) at the same time I updated the BIOS to ver 3.30 (Was running 3.10 previously)

Now I have an issue with my USB Devices, especially external storage.
My Kingston USB3 FCR-HS3 Card reader LED will flash every few seconds as if an SD card is being accessed, after a random time I will get a USB Malfunction Error pop up in Windows, if I check the device under device manager I get the Yellow Exclamation mark and this error "(Port Reset Failed)" unplugging the card reader in and out resolves it for a few minutes, but that will keep coming back.

I tried the card reader on 4 other computers and this does not happen, I've updated all chipset drivers, even tried going to BIOS 3.10, 3.20 and 3.30 again. I've cleared CMOS several times, checked and tried every BIOS setting and it still happens.

I sometimes get a "Link in compliance mode" error, I think this may come up with a USB3 Flash drive or external USB3 hard drive enclosure.

Also my AsMedia USB3 hard drive enclosure randomly shows activity on the LED even when I don't have a formatted disk in there, or no disk at all.

It seems the USB ports are getting polled or reset every few seconds and some devices don't like this.

I've re-installed Windows a couple of times, removed every USB device including the keyboard/mouse and just left the devices that cause issues in there one at a time and it still happens. I've done the usual by removing all the USB drivers in device manager and letting them re-install. I cannot seem to resolve it.

I have a feeling something in BIOS 3.30 has changed something (Something I can't change by rolling back to previous versions) or Windows 10 Build 1903

Please help as I love this board and recommended it to a lot of people and left great reviews for it.

Glad you figured it out. Sounds like the newer Win10 versions have an install bug :(

RLGL wrote: MS has issues with some card readers in 1903. Known bug

This is a different issue to that, a few USB devices were playing up, granted they were all mass storage devices.
The known bug is with a Realtek card reader.