Windows 10: Windows 10 upgrade problem - Unable to open excel file created in office 2010 in windows 8.1

About a month ago I upgraded my OS from windows 8.1 to windows 10. I am unable to open excel file created in office 2010 with the previous OS i.e windows 8.1. When I click on the file a message is seen " file LNP.xlsx cannot open because the file format or extension is not valid . Verify that the file extension matches the file format ". Please help.

Thanks.

:)

 

I need to convert Quattro pro files to windows Office 2007

The link says for Office 2000 and 2003. Will this work for 2007?

 

I need to convert Quattro pro files to windows Office 2007

But does it work for Office 2007?

 

I need to convert Quattro pro files to windows Office 2007

http://office.microsoft.com/en-us/excel/ha010448731033.aspx

Install the Quattro Pro 5.0 converter
To install the converter for Quattro Pro versions 1.0 through 5.0 for Windows, do the following:

Click Start on the Windows taskbar, point to Settings, and then click Control Panel.
Double-click the Add/Remove Programs icon.
Click the name of the Microsoft Office 2000 or Microsoft Excel 2000 program that you have, and then click Add/Remove.
Click Add or Remove Features, and locate the Quattro Pro 5.0 Converter under Microsoft Excel for Windows.
Click Run From My Computer to install the converter to your hard disk.
Click Update Now.
Open a Quattro Pro file
To open a Quattro Pro file in Excel, follow these steps:

Click Open on the File menu.
In the Look in list, click the drive or folder that contains the file you want to open, and then locate the folder that contains the file.
In the Files of type list, click Quattro Pro 1.0/5.0 (Win) (*.wb1) if your files are from Quattro Pro for Windows versions 1.0 through 5.0, or click Quattro Pro/DOS Files (*.wq1). The former requires installation of the converter, as outlined above, before it appears in the list.
Double-click the file you want to open.
Notes

You cannot save files in the Quattro Pro 1.0/5.0 (Win) (*.wb1) format. If you open one of these files and make changes to it, you can save changes by saving as a Microsoft Excel Workbook (*.xls) or in another spreadsheet format.
You can save changes in the Quattro Pro/DOS format, but changes made using features that are unique to Excel may be lost.


or


http://office.microsoft.com/en-us/excel/HP052538431033.aspx

You can open a file created in another program, such as Lotus 1-2-3 or Quattro Pro, in Microsoft Excel the same way you would open an Excel file. You can then save the file in its original file format or as an Excel workbook using the standard Excel save commands. Files saved as Excel workbooks might not retain all of their original formatting, and features and formatting of an Excel workbook might not be available in other programs.