In very many cases of data recovery and rebooting of your PC you can do little about it immediately and you also have to install the latest version of that program to fix it. First see if the program in question can work on Windows or Mac. Files with the extension EXE do not work on a Mac and everything that ends with DMG or APP is not suitable for Windows. Sometimes a manufacturer also offers a patch, a small piece of extra software for adaptation which makes the program usable. Users of Office 2003, for example, can download such a patch via Microsoft so that their version of Word, Powerpoint etc. can open the .DOCX and PPTX files. So don’t give up, but search the Microsoft and Apple sites for such patches. For example, enter Office as the patch search term. Using a data recovery software will be perfect there.
You must have experienced it: a file has been downloaded and after the double click nothing happens or the system says that there is no application to open the file. This often happens with PDF files and the solution is very simple: get a PDF reader and install it. Adobe PDF Reader is good and also free.
If your Office version is on the older side, you may not be able to open DOCX and PPTX files. They are part of the more recent versions of Microsoft Office. You can get a