127.0.0.1: Activate.adobe.com

Security software (antivirus) often flags hosts file modifications as (Potentially Unwanted Application) or even trojan behavior. If you ever sell your computer or take it for repair, a technician might wipe your hosts file, instantly breaking your Adobe installation.

If you have this line in your hosts file and you actually to use a legitimate Creative Cloud subscription, it will cause constant "Unable to Reach Servers" or "Trial Expired" errors. Adobe support and community forums frequently tell users to "review" their hosts file and delete these lines to fix connectivity issues. Perspectives from the Community 127.0.0.1 activate.adobe.com