When you double-click on a file in Windows, it will automatically open a default program that is configured to manage these types of files. It is common, though, want or need to use a different ...

Files Opened from Email Programs Depending on your email client and operating system, opening and saving attachments directly from the email could place them in a temporary folder that's hard to find.

You can open .DAT files that contain text, with text editors, like Notepad, Notepad++, VS Code, etc. But it is not possible to know what contains in a DAT file.

But, a lot of times, it doesn’t. Now, how to tell which process has a file open? If it is urgent, you need to identify the process locking a file and then end the process to modify the target file.

You may need to search in a Windows 10 computer to find files, folders, or programs. Windows 10's search feature is a quick way to find what you need.