The resolution appears to be two fold,
First of all you might want to add the following registry key depending on the application for which the user gets a prompt:
Click on Start Run then type in the following command for respective applications.
reg add HKCU\Software\Microsoft\Office\12.0\<application>\Options /v NoReReg /t REG_DWORD /d 1
reg add HKCU\Software\Microsoft\Office\12.0\Word\Options /v NoReReg /t REG_DWORD /d 1
reg add HKCU\Software\Microsoft\Office\12.0\Excel\Options /v NoReReg /t REG_DWORD /d 1
reg add HKCU\Software\Microsoft\Office\12.0\Outlook\Options /v NoReReg /t REG_DWORD /d 1
reg add HKCU\Software\Microsoft\Office\12.0\PowerPoint\Options /v NoReReg /t REG_DWORD /d 1.
This should normally take care of the issue in applications like Outlook ,Word and Power point .
The user might also get a secondary error message when opening Excel application that states the following.
Opening excel in the application safe mode would bypass the error. But this could be misleading coz the issue has more to do with permission than add-in within the application.
To resolve this problem you would need to perform the following steps:
1) Go to start > run > regedit
2) Navigate to the HKEY_CLASSES_ROOT > Excel.Chart.8
3) Right Click on key and select Permissions
4) In the Permission windows > Click on Add Tab and add everyone
5) Once this is done Click on the Advanced Tab > Owner > Highlight Everyone > Click on Apply and Ok
6) In the Permission > Select Everyone > enable the check box for Full Control and Read, then Click on Apply and Ok.
7) Click on F5 to refresh, this should create a new Sub key below Excel.Chart.8 called Protocol > Right Click on the key and repeat step 3 – 5.
8) Refresh again and follow the same sequence of steps to add permission to the following Sub keys StdFileEditing >Server.
9) Close the registry editor.
This should resolve the issue for good.