Hi Baba,
Does the issue occur while opening Excel application or while opening the workbook?
If the issue occurs when you open Excel application then you may manually uninstall and reinstall Excel and check if it works fine.
Make Excel unavailable from Maintenance Mode
Click Start
Control Panel
Program and Features
Choose Microsoft office in the list
Click Change
Add or remove features
Click the drop down arrow for Microsoft Excel and choose ‘Not Available’.
Important This section, method,
or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you
modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry,
http://windows.microsoft.com/en-us/windows7/back-up-the-registry
Delete "Excel" key from the following location in registry:
(If some keys can't be deleted or found, please skip them, this will not influence the result of the troubleshooting)
Click on the + sign to expand the registry keys, the keys following the backslash () are sub keys, right click on the last sub key and click Delete.
HKEY_CURRENT_USER\Software\Microsoft\Office\8.0\Excel
HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Excel
HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Excel
HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Excel
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Excel
HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Excel
HKEY_CURRENT_USER\Software\Microsoft\Office\Excel
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\8.0\Excel
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\9.0\Excel
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\10.0\Excel
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\11.0\Excel
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\12.0\Excel
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\14.0\Excel
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\Excel
- Close the Registry Editor
Make Excel Available from Maintenance Mode
Click Start
Control Panel
Program and Features
Choose Microsoft office in the list
Click Change
Add or remove features
Click the drop down arrow for Microsoft Outlook and choose ‘Run All from my computer’
Restart the system and check if Excel works fine as expected.
I hope it helps. Let us know if you need further help.
Thank you.