You have received a file named new.

You have received a file named new.com in your email as an attachment. When you execute this file in your laptop, you get the following message:

'EICAR-STANDARD-ANTIVIRUS-TEST-FILE!'

When you open the file in Notepad, you get the following string:

X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*

What step will you take as a countermeasure against this attack?