Computer is locked up. Message - Microsoft Windows Firewall Alert! Error Code 2V7HGTVB

Read this article and take appropriate action. This is a fake spam attempting to get you to respond to them in order to rip you off. Run Antivirus and Malware software in order to remove the spam.
https://malware-guide.com/blog/what-is-error-code-2v7hgtvb-pop-up-scam-how-it-works