Nothing is wrong with your computer, and nothing has been encrypted or locked. This page is a phishing & scareware awareness test run by IT Security Team.
A real message like this one — demanding payment, threatening your files, or rushing you to act — is an attack. The correct action is simple: don't pay, don't panic — report it.
How to report: contact your IT Security team through your normal channel (help desk ticket, hotline, or the Report Phishing button in your mail client).