A data protection system for Windows applications has been launched by Visionsoft. Winlock allows users to attach passwords to any application they want to protect. The program can restrict access to Windows applications and icons, including File Manager, and also to DOS applications. The program is aimed at medium-sized firms with between 10 and 500 PCs. The current system cannot be used on Windows '95, but Visionsoft hopes this will be remedied by July. Winlock is available at the special price of £495 for an unlimited corporate licence until June.