Provides relief from repetitive stress problems by monitoring the mouse, the keyboard and the time spent at the workstation. When the programmable number of mouse clicks, keystrokes, or minutes occur, a break screen pops up and counts down your break time. A password enforcement option is also supported for ensuring that break time is not interrupted. Ambient Soothing Sound.
You can try Ergotimer (tm) without fear as it doesn't change any system configuration.
This software is a commercial software. You will be able to download and test Ergotimer during a certain period of time, then, if it does what you need, you will have to acquire the full version from Ergotimer publisher. The Ergotimer 2.0 free trial version contains an installer and an uninstaller, and has a size of 761 Kilobytes.
For additional information and support request, please contact directly Ergotimer publisher.

Ergotimer Screenshot