Lỗi Excel :could not khi open

To work around this issue, follow these steps:

1. Click Start, and then click Run.
2. In the Open box, type regedit, and then click OK.
3. Open the following registry key:

HKEY_CLASSES_ROOT\Excel.Sheet.8\shell\Open\command

4. In the right pane, click (Default).
5. On the Edit menu, click Modify.
6. Remove the %1 from the end of the Value data string so that the data string reads as follows:

"C:\PROGRAM FILES\MICROSOFT OFFICE\OFFICE\EXCEL.EXE" /e (including the quotation marks)

7. Click OK, and then close Registry Editor.

More information

Note Because there are several versions of Microsoft Windows, the following steps may be different on your computer. If they are, see your product documentation to complete these steps.
To change the Open action of a file type, follow these steps:

1. Start the Microsoft Windows Explorer.
2. On the Tools menu, click Folder Options.
3. Click the File Types tab.
4. Click the file type that you want (that is, Microsoft Excel Worksheet) in the Registered file types list.
5. Click Advanced.
6. Under Actions, click Open, and then click Edit.
7. Make the changes that you want, and then click OK.
8. Note: For additional file types, you may also need to review these registry locations:

HKEY_CLASSES_ROOT\Excel.Sheet.12\shell\Open\command

HKEY_CLASSES_ROOT\Excel.SheetBinaryMacroEnabled.12\shell\Open\command

HKEY_CLASSES_ROOT\Excel.SheetMacroEnabled.12\shell\Open\command

HKEY_CLASSES_ROOT\Excel.Template.8\shell\Open\command

HKEY_CLASSES_ROOT\Excel.TemplateMacroEnabled\shell\Open\command

HKEY_CLASSES_ROOT\Excel.Template\shell\Open\command