USB files changed to strange symbols when plugged into System.?

I just wanted to know what all special characters are allowed and valid for an email address. Can characters like “?” and “-“ be used in part after “@” sign. Please help me with an answer.

I am a little naïve when it comes to using Excel. I have created many sheets and have been coming across the problem of sorting the data by date. Can anyone help me with that?

  Security System: a word which adds a full stop to the theory of computers. It completes and complements the computing device. The Software, The Hardware, and The Operating System work with the ease and pace due to the security system. Security is defined in one word as protection. Computer Security is also referred as Cyber Security. It safeguards the computer system from damage and theft whether in software or hardware. Computer Security is solely concerned with the control of risks and uncertainties. Security is very essential whether in banks, commercial business, etc. So how can the security let go in...

Hello, Notify the features of tri fold business card template and the way to buy the same as well for the reference only and thanks for solutions too.

Hello, Notify the steps for the trying to connect to Microsoft exchange and the various version of it as well and thanks for solving it and revert asap.

Hello, Notify the trusteer endpoint protection removal tool and the steps to uninstall the same as well and thanks for solving it too.

Hello, Notify brief for the trial version of Microsoft project and also mentioned the supported OS for it as well and thanks for the solutions too and revert asap.

Hello, Notify the steps for the troubleshoot issues with Microsoft SharePoint foundation and the various SharePoint too and thanks for solving as well.

Hello, Notify about the troubleshoot dns server not responding and its solutions in stepwise for the easy reference and thanks for solving too.