- The RegClean utility finds errors in the System Registry, and you receive the option to Fix Errors in the RegClean utility.
- When you install a Microsoft Office program whose installation state is Installed on First Use and then double-click a document that is associated with that program, the Office program may not start. Instead, the Open With dialog box appears and the Office program is not listed.
Method 1: Undo the Registry Changes from RegCleanTo undo changes made by the RegClean utility, locate the Undo.reg file, and then double-click the Undo.reg file. This restores the registry entries that were removed.
The RegClean utility creates a file in the following format:
Method 2: Demand Install the Office ProgramIf this issue occurs when you double-click a document from Microsoft Windows Explorer and the document should be associated with an Office program whose installation state is Installed on First Use, follow these steps:
- Click Start, and then click Programs.
- On the Programs menu, click the shortcut for the Office program that you want to start--for example, click Microsoft Word.
Method 3: Remove and Reinstall OfficeYou may have to remove and reinstall Office to resolve the issue. To do this, follow these steps:
- In Control Panel, double-click Add/Remove Programs.
- In the Add/Remove Programs Properties dialog box, click the Office entry--for example, click Microsoft Office XP Professional.
If your operating system is Microsoft Windows 2000 or Microsoft Windows XP, click Remove.
If your operating system is Microsoft Windows 98, Microsoft Windows NT 4.0, or Microsoft Windows Millennium Edition (Me), follow these steps:
- Click Add/Remove
- In the Maintenance Mode Options dialog box, click Uninstall Office.
- Click Next.
- Click Yes to confirm the removal.
- When Office is removed, insert your Office CD-ROM, and then run the Setup program to reinstall Office.
Article ID: 299958 - Last Review: Sep 12, 2011 - Revision: 1