TL:DR; Lock My PC Free Edition is a good and free alternative to standard Win+L Windows lock.
Lock My PC Free Edition is a good and free alternative to standard Win+L Windows lock. Use it every time when you leave your computer unattended.
User Control allows you to block any undesired window title or any application / EXE-file. On the Internet you can define exactly which contents shall be allowed and which not. Varied blocking possibilities for Windows Internals.
PDF Anti-Copy is a free PDF security utility that prevents PDF content from being copied and converted to editable formats. After processed by this tool, the PDF content could be viewed, but will never be copied and converted to editable files.
REFOG Personal Monitor is an advanced monitoring tool that logs keystrokes, takes screenshots, saves program activity and Clipboard content, and keeps an eye on your Instant Messaging sessions.