Missing OneDrive context menu in windows 10

(1) Open (User) folder on PC

(2) Select View tab and click View Options at far right

(3) In folder options dialog box, select View Tab and check "Hide Protected Operating system files" and click OK.

(4) In (User) folder, delete all but the newest "desktop.ini" files.

(5) Check for any duplicate "One Drive" folders and delete all but the one that has your files and folders in it.

(6) Return to Folder Options and clear "Hide Protected system files" option and click OK.

I had an orphaned folder from a system rebuild that was installed with windows. I did a file restore with Acronis and it copied the backed up One Drive folder to the previous installation location on my D: drive, leaving the C:\Users\One Drive folder location in place. I should have moved my user folders to the D: drive FIRST, then run file restore..

Open (User) Folder, Select View tab at top and View Options at far right. 

In View Option dialog select to "show hidden windows system files" and accept security warnings.

(1) Check for any duplicate OneDrive folders. Open each folder to determine which one has your files in it and delete all other duplicate folders.

(2) Check for "desktop.ini" files and delete ALL but the most current file. (Right click, >Properties:

I noticed this issue came up after restoring data from October 2018 Update. Upon a restart after update, my PC would no longer boot and all attempts to repair the installation failed. I had to completely wipe my drive, reinstall Win10 Insider and then restore files and folders using Acronis True Image 2018. This created duplicate system folders and .ini files resulting in the loss of OneDrive Context menu as well as OneDrive not syncing files properly.

(3) Re-open Folder View Options and clear "hide windows system folders" option.