Error 10066 Directory Not Empty – Causes and Fixes Contents CausesFixesStep 1: Delete or Archive files Directory not empty Causes The directory still holding some files or folder in it. Fixes Step 1: Delete or Archive files Delete or archive the files or folder inside that particular directory before delete the directory. Updated on June 23, 2020 Was this article helpful? Yes No Related Articles Error 10068 Server Full – Causes and Fixes Error 10061 Connection Refused – Causes and Fixes Error 10060 Unable Connect – Causes and Fixes Error 10054 Connection Reset – Causes and Fixes