did you find this string? (e.g., in a browser address bar , a system log , or an email ?) Is it associated with a specific program ?
If you see the error proxy-url-file-3A-2F-2F-2F , it usually means an application tried to save the URL but double-encoded the special characters: %3A is the colon ( : ) %2F is the forward slash ( / ) proxy-url-file-3A-2F-2F-2F
