You cannot start or install Excel and the Excel.exe file on your hard disk is renamed as Excel.exe.vir

You cannot start or reinstall Excel on your computer. For example, you may experience one or both of the following issues:

• When you try to start Excel, you receive an error message similar to one of the following:
  Error 1706. No valid source could be found for the product Microsoft Office. The Windows installer cannot continue.
  Error 1309: Error reading from drive:\Program Files\Microsoft Office\OfficeVersionNumber\Excel.exe. Verify that the file exists and that you can access it.
• When you run Microsoft Office Setup to reinstall Excel, you receive an error message similar to the following:
  Error 1911. Setup cannot register type library for file drive:\Program Files\Microsoft Office\OfficeVersionNumber\Excel.exe

Additionally, the Excel.exe and Graph9.exe files on your hard disk are renamed as Excel.exe.vir and Graph9.exe.vir.

These issues may occur if your computer is infected with the W32/Insane.dam virus.

The W32/Insane.dam virus generates a hoax report on computers that are running McAfee antivirus software (for example, McAfee VirusScan) in which the .dat files and scan engines are outdated. The McAfee antivirus program reports executable (.exe) files as infected and renames these files as Filename.exe.vir, where Filename is the name of the executable file for the program -- for example, Excel.exe.vir.

To resolve this issue, update your McAfee antivirus program to use the latest scan engine that can detect files that are corrupted by the W32/Insane.dam virus. Then, rename Excel.exe.vir and Graph9.exe.vir as Excel.exe and Graph9.exe. For more information about how to do this, visit the following McAfee Web site:

Microsoft does not provide software that can detect or remove computer viruses. If you suspect or confirm that your computer is infected with a virus, obtain current antivirus software. For a list of antivirus software manufacturers, click the following article number to see the article in the Microsoft Knowledge Base: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.