The 1809 version of Windows 10 (published and suddenly retired in October 2018 and then republished) has caused several issues among many software, including MechworksPDM ExcelBOM functionality.

Current MechworksPDM release is compatible with such windows update, so if you’re experiencing any issue please make sure you’ve installed the latest MechworksPDM service pack.

Here below are some link discussing the topic:

https://www.windowscentral.com/windows-10-october-2018-update-problems-complaints

https://www.ghacks.net/2018/10/04/bugs-and-issues-of-windows-10-version-1809/