An upcoming change to Windows 11 will see the "open with" interface recommend apps from the Microsoft Store when dealing with ...

A file extensions is a suffix to the filename that's used to indicate what software or program it's associated with. If the required software to read the file is ...

Many times we receive files whose extension is unknown. This often happens when the sender puts a wrong file extension and it becomes difficult to open the file due to an unknown format. Here is a ...

Website WhatIsThatFile.com offers a simple, handy little interface that lets you type in an unknown filename or filetype and gives you as-you-type results. While we still do not cover ALL of them, we ...

Some Office users have recently experienced “Unknown error trying to lock file” while using Office apps like Excel, Teams, OneDrive, PowerPoint, etc. It’s even ...

Most people are conditioned by now to not open unknown file attachments—especially file attachments on emails from unknown sources. Just in case you somehow missed the memo, though, there is a new ...

Q. I received e-mail from a relative that says it is in a winmail.dat file. When I try to open the file, I get a message that says something like: "You are attempting to open a dat file. They are used ...