Anyone else having problems installing Definitions updates for Windows Defender, Win 10 Pro, 64-bit?
Definitions 1.207.354.0 and then two attempts at 1.207.631.0 failed. The last definitions update that installed was 1.205.2388.0, back on 13-Sept.
The latest Flash update installed tonight, even though the definitions update failed during the same attempt to update. So it's not a total failure of Windows Update, just for Windows Defender updates.