Hello,
We're having an issue with people who have Office 2013 installed and are trying to open shared office documents from SharePoint. This problem does not come up for people with Office 2010 installed.
The error they get is: "To open this workbook, your computer must have a version of Microsoft Excel installed and your Web browser must support opening files directly from Excel in the browser."
This has only happened to people running Office 2013 on their computer. They can open the file in the browser, but as soon as they try to "Open in Excel" or Word, etc they receive that error. Also these files are opened using Internet Explorer, so that shouldn't be a problem.
I am working on upgrading SharePoint 2010 to SP3, but am not convinced that this is all I need to do for this to work properly. Any ideas/suggestions are greatly appreciated!