A fake Microsoft Critical Security Update email is currently circulating in various global email systems. If you receive it, do not open any attachments or click any links contained in the email.
As always, you should only open attachments if you know the sender, and it is something you are expecting. If ever you are unsure whether or not an attachment is legitimate, you should contact the sender before opening it. Legitimate sources will never tell you to download "experimental" private versions of updates, or ask for your personal data.
To protect your computer, ensure you are running McGill's antivirus software (free from McGill's Software Licensing website) and that you have installed the latest security updates. Find more on Best practices against IT vulnerabilities and threats in the IT Knowledge Base.
For additional information, contact the ICS Service Desk.