New Windows 10 Insider Preview Fast+Skip Build 18885 (20H1) - April 26 Insider

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I am on 18875.1 and receive the following error
This PC can't be upgraded to Windows 10.
Your PC has a driver or service that isn't ready for this version of Windows 10. No action is needed. Windows Update will offer this version of Windows 10 automatically once the issue has been resolved

I get this for 18885 (offered) and 18890 (uupdumpdownloader)
Never had this before
What am I missing?

robgr said:

What am I missing?

This maybe:
Microsoft blocks Windows 10 May 2019 Update with USB device or SD card - Windows 10 Forums

It looks like you have a thumb drive or a SD card in one of your USB port(s)? External or Internal HDD may also give the same result. This bug was fixed on build 18885.

Thank you MikeMecanic. I have since disconnected DVD & Blu-ray drives, 2 x HDs, internal card reader/USB hub, disconnected 2 x network drives and ensured no usb/card devices are inserted but I still get the same error as above!
The only thing still connected is my OS SSD
What else can I try?
Why am I still getting this error?
This is for going from 18875.1 to 18890
Other than a clean install is there any work around for this issue?

Issue now resolved. I had Battleye installed
Likely leftover when my son temp. installed Steam for test purposes
This MS script was useful, https://aka.ms/AppRPS
Even after deleting Battleye folder I still needed to delete the service (disabling was't enough)
start a command prompt as administrator and enter “sc delete BEService”
The upgrade then proceeded as normal for me