Though DAT files, which house data as the shortened name implies, are usually best left alone, here's how you can open them.

If you're having trouble opening a DAT file, I'll show you a simple and free way to do it. This method works on both Mac and PC. Just open your browser and go to winmaildat.com. It's a ...

Index.dat file reader or viewer You can use freeware Index.dat Suite or Index.dat Scanner to view the index.dat file in Windows 7 or earlier. But you will not be able to use these freeware on ...

Have you ever encountered a strange file with an NTUSER.DAT name on your Windows PC? Don't worry, it's not a virus, but quite an important file. In this article, we'll explain what it is and why you ...

Q. I sometimes receive e-mail messages with a “winmail.dat” file attached that I cannot open. Why does this happen, and what can I do to fix it? A. The winmail.dat file usually appears because ...

If you double-click a file and it opens in the wrong program, try this: In Windows’ File Explorer, right-click a file with the extension you have in mind, and select Open with.