Antivirus tends to block the QuickBooks functions. So, simply disabling will do the trick. The third-party antivirus considers some of the QuickBooks functions as malicious activity. So, they move the file to a chest. This causes havoc in the QuickBooks’ working. QuickBooks Error 6000 77 can be caused because of this issue as well. You can simply disable or uninstall the antivirus temporarily till the QuickBooks error code 6000 77 is rectified. These were the solutions to QuickBooks Error Code 6000 77. Hopefully, our methods did the trick for you. If so, check out this article.