<span>If a attachment is not reliable to open, terrible effects can happen, peradventure it may have a virus or even malware that can destroy a computers software.
To avoid this and stay on the safe side, try the following:-
- Open it in protected view - Do not save the attachment on your computer - Look at the author and read the message carefully to make sure it is not biased. - Open it on a flash-drive </span>
To have safety measures when opening a file and you dont know if it is reliable or not you should:
Scan the file with an antivirus. ( I prefer Avast ) Open the file in protected view. Only open the file if you know who sent you the file or where you got it from