Troubleshoot and resolve error -6177, 0,  This issue has been resolved in the latest QuickBooks release. Either follow the provided link to download the latest release, or use the manual troubleshooting steps to fix the problem.

Steps to resolve error 6189 by setting appropriate access permissions for the folder that contains your company data file.

Network errors such as error -6000, -80: "An error occurred when QuickBooks tried to access the company file," can occur when restoring a QuickBooks company file from a backup, updating a company file, or attempting to open a company file.

Steps for resolving error -6190, -83 error, which can happen when more than one computer is set to host the same company file.

Steps to resolve rrror -6010, -100: "Your QuickBooks installation may have been modified. Try re-installing QuickBooks and then try again. (-6010, -100)." This issue may be related to issues with a security software with Internet monitoring enabled, or to a registry cleaning program.

Steps to resolve error -6000, -83,  "An error occurred when QuickBooks tried to access the company file," or a message about not having sufficient permissions to the specified folder.

You can set access permissions for QuickBooks database users in Windows XP.