My VM with Win 10 was just upgraded to 10240 and the Windows Defender updates still fail to due to a connectivity failure despite Internet access working fine in the VM and I cannot access OneGet as the module files are not installed or so it says in Powershell

Please run a system file check (SFC) & DISM (if necessary) if you are on win 8 or higher
All instructions are in our Wiki article below...
Should you have any questions please ask us.

System file check (SFC) Scan and Repair System Files