Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Step 1 - Install Updates
Go to http://office.microsoft.com/en-us/default.aspx, click on "Check for Updates", and follow the instructions.
Step 2 - Repair the Excel Installation
This option is only available in Excel 2000 and later. To repair the Excel installation, start Excel and choose the menu command Help->Detect and Repair. The product CD may be required.
Step 3 - Remove/Reset the Tool Bar Configuration File
Reset the toolbar settings file by deleting the Tool Bar Configuration File while Excel is not running. This file is usually located in the folder
C:\Documents and Settings\Your Login Name\Application Data\Microsoft\Excel and is named "Excel *.xlb".
Step 4 - Reset the Registry Entries
Instruct Excel to reset the Excel registry entries. Do this by opening the Start menu and selecting Run. Enter "Excel.exe /RegServer" and click OK.
Step 5 - Clear the Option Settings
Run RegEdit (Start->Run, enter regedit, and press ENTER) and navigate to HKEY_CURRENT_USER\Software\Microsoft\x.0\Options where x is 9 for Excel 2000, 10 for Excel 2002 or XP, and 11 for Excel 2003. Delete all entries except for "(Default)".