To help me give you more specific advice, could you tell me (e.g., an email, a website popup, or a shared drive) and if you have already clicked on it ?
: Hover over links to see the destination and never download attachments from unsolicited emails.
: Using terms like "expire date" creates a false sense of pressure, hoping you will open the file quickly to avoid a perceived problem.
: If you did open the file, immediately disconnect from the internet and run a full system scan with a reputable antivirus like Microsoft Defender or Malwarebytes . Best Practices for the Future