When you use Help in a Microsoft Office program (click Microsoft program Help on the Help menu), both the Answer Wizard and the Index tabs may be blank.

This problem may occur if you have both Microsoft Office 2000 and Microsoft Office XP installed on your hard disk drive.

For more information about how to run multiple versions of Microsoft Office, click the following article number to view the article in the Microsoft Knowledge Base:

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To work around this problem and to prevent the Answer Wizard and the Index tabs from appearing blank, change the security permissions on the following two registry keys to so that you can have full control for the Everyone group:To do this, follow these steps:

1. Quit all your Office programs.
2. Click Start, click Run, type regedit in the Open box, and then click OK.
   
   Note If your operating system is Microsoft Windows 2000, type regedt32 instead of regedit. The security settings are not available in regedit on Windows 2000.
3. In Registry Editor, locate one of the following two registry keys:
   HKEY_CLASSES_ROOT\MsoHelpAWDlg\CLSID
   HKEY_CLASSES_ROOT\MsoHelpKeyDlg\CLSID
4. Right-click the selected registry key, and then click Permissions.
5. On the Security tab, click the Everyone group, and then click to select the Full Control check box.
6. Click OK to close the Permissions dialog box.
7. Repeat steps 4 through 7 for the other registry key that is listed in step 3.
8. On the File menu, click Exit to quit Registry Editor.

When you use Help with the Microsoft Office Assistant turned off (disabled), the Msohelp.exe file displays the Microsoft program Help dialog box with three tabs on the left and a display area on the right for the active help topic. If there are two versions of the Msohelp.exe file on your computer, and you do not have Administrator rights, both the Answer Wizard and the Index tabs may appear blank.

It is typical to have two versions of the Msohelp.exe file on a computer if there are different versions of Office programs installed on your computer. If a program that is from Group A in the following table is installed at the time as a program that is from Group B in the following table, the program that was most recently installed or repaired functions as expected, but the program that is from the other group experiences the problem that is described in the "Symptoms" section.

Both versions of the Msohelp.exe file reference a specific pair of registry keys, but the values of those registry keys will be different depending on the version of the Msohelp.exe file that is using the registry keys. When the Msohelp.exe file encounters an unexpected value in the registry keys, the Msohelp.exe file tries to rewrite the registry keys with the expected value. If the Msohelp.exe file cannot change the registry keys, both the Answer Wizard and the Index tabs appear blank.

This problem does not occur on computers that have Microsoft Windows 95, Microsoft Windows 98, or Microsoft Windows Millennium Edition (Me) installed because the registry is not secure. However, on both Windows 2000 and Windows XP, general users do not have permissions to write to the following registry keys that are referenced by the Msohelp.exe file: