Anyone else still having this issue? We have narrowed it down to an issue with Windows 10 but still no support from Intuit.

2 Windows 8.1 machines work perfectly for any year and user.

4 Windows 10 machines are sporadic. Will work sometimes but usually get the "K-1 indexing file is currently in use" error - even when that same user can login the 8.1 machines and export it immediately after.