Reinstall or Repair Excel
This procedure detects and repairs problems associated with installed Microsoft Office programs, such as registry settings and missing installation files. It does not repair personal files such as worksheets or templates.

To run Detect and Repair, use either of the following methods.

Method 1
1. On the Help menu in Excel, click Detect and Repair.
2. Click Start.

To restore program shortcuts to the Windows Start menu, make sure that the Restore my shortcuts while repairing check box is selected.
Method 2
1. Double-click the Add/Remove Programs icon in Control Panel.
2. Double-click the Office 2000 or Excel 2000 entry listed in the Add/Remove Programs dialog box.
3. Click Repair Office.
4. Click either Reinstall Office or Repair errors in my Office installation, and then click Finish.

NOTE: If you selected Repair errors in my Office installation, select the Restore my shortcuts check box if you are having problems with your Office shortcuts.