OK so this is due to a problem with Edge.
I have tried DISM and SFC fixes but they do not detect any issues.
I am also seeing:
Log Name: Application
Source: Microsoft-Windows-Immersive-Shell
Date: 10/6/2017 7:31:03 AM
Event ID: 5973
Task Category: (5973)
Level: Error
Keywords:
User: SIRCLES\simon.cooper
Computer: computername.domain.suffix
Description:
Activation of app Microsoft.MicrosoftEdge_8wekyb3d8bbwe!ContentProcess failed with error: The remote procedure call failed. See the Microsoft-Windows-TWinUI/Operational log for additional information.
Event Xml:
5973
0
2
5973
0
0x2000000000000000
30883
Application
computername.domain.suffix
Microsoft.MicrosoftEdge_8wekyb3d8bbwe!ContentProcess
-2147023170
and
Log Name: System
Source: Microsoft-Windows-DistributedCOM
Date: 10/6/2017 7:31:39 AM
Event ID: 10010
Task Category: None
Level: Error
Keywords: Classic
User: SIRCLES\simon.cooper
Computer: computername.domain.suffix
Description:
The server Microsoft.MicrosoftEdge_40.15063.0.0_neutral__8wekyb3d8bbwe!ContentProcess did not register with DCOM within the required timeout.
Event Xml:
10010
0
2
0
0
0x8080000000000000
369114
System
computername.domain.suffix
Microsoft.MicrosoftEdge_40.15063.0.0_neutral__8wekyb3d8bbwe!ContentProcess