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 ...

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 ...

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 ...

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 ...

Every file and every program leaves traces in your system: It accesses other files, uses Windows resources, makes entries in the registry, and possibly installs additional software. In the best-case ...

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 ...

Unknown files have become one of the biggest security threats to organizations, catching the attention of C-suite officers. Highly-publicized data breaches at brands like Target, Home Depot and Sony ...

Many endpoint protection solutions allow files to open if they are not confirmed as malicious. Comodo denies unknown files access until they are proven to be benign Anyone who has ever had to deal ...