When you encounter QB Error 2000, you tend to receive such messages like below:
Below is the process to resolve the QuickBooks Error 2000.
Rename the QBWUSER.ini file
You can rename the QBWUSER.ini file.
Note: When you rename the QBWUSER.INI file erases information stored within your list of previously opened company files so need to re-open your company files to be populated in the recently opened files list.
Windows 8, 7 or Vista
Press Windows + E to open the Computer window.
Go to organize menu – choose Folder and search options.
Click the View tab.
In the Advanced Settings section, under Hidden files and folders, select Show hidden files, folder, and drives.
Once there is a check mark next to Show hidden files, folder, and drives, Click Ok.
Double-click the C:\ drive, and navigate to the following path: C:\Users\[Your user name]\AppData\Local\Intuit\QuickBooks [year]
Right-click on the QBWUSER.INI file, and choose Rename.
Replace .INI with .INIold and press the Enter key.
Also rename the EntitlementDataStore.ecml file by following the steps in this article.
If you are able to open QuickBooks after renaming the EntitlementDataStore.ecml file or the QBWuser.ini file, attempt to open a Sample File:
Click the Open a Sample File drop-down menu.
Choose Sample Product Based Business.
If the Sample File does not open there may be issues with the Windows OS causing QuickBooks not to open.
If the Sample File does open, proceed to Solution 4 as there may be file/folder permission damage with your particular company file that won’t open.
If the all the above solution fail to fix the QB error 2000 the issue you can read the discussions and post messages and questions relating to your issue on free QuickBooks Community site by Intuit or you can connect with the QuickBooks technical support for guidance and error fixation.