Many users reported that the issue ‘File format does not match the extension could also be resolved by unlocking the file. So, if you are not able to open the file sent as an attachment, use ...

How to open a file with no extension in Windows 11/10. There are some free file identifier tools that let you know the extensions of the unknown file types. We have listed some of these tools below.

Red Eye Rose received a file with a strange extension. She doesn’t know into what program she should load it. Neither does Windows. I doubt that anyone knows all of the file extensions used ...

How to change the default program a file opens with in Windows 7. When you open files that have a particular file extension, Windows will look at its configuration to determine what the default ...

How to change the default program a file opens with in Windows 7. When you open files that have a particular file extension, Windows will look at its configuration to determine what the default ...

In fact, they’re made up of existing, open file formats. If you don’t believe me, try this: Rename a .docx file, changing the extension to .zip . Then double-click it.