QuickBooks Error 6129 take place when Your antivirus program might treat the new file as a threat, A problem with .ND file is a very prominent reason for this error, Windows registry files having invalid entries can also cause the error or You can experience this error after a sudden system shutdown due to some reasons and If you have any query related to QuickBooks Error 6129 and looking for instant assistance then feel free to contact us on +1 800-579-9430.