https://www.bleepingcomputer.com/news/microsoft/microsoft-resumes-rollout-of-windows-10-october-2018-update/

Windows 10 October 2018 Update was originally released on October 2 but Microsoft paused the rollout process on October 6 after a number of issues such file deletion, Task Manager reporting glitch were reported.

Windows 10 October 2018 Update is once again available for download but it's rolling out in stages so it may not show up on your device now. To check if it is available, you can head over to Settings > Update & Security > Windows Update and check for new updates.