Make a freeze program in C#

Question

I want to make a program that shows a popup message showing a timer, and freezes the windows, all processes... and after the given time, like 10 minutes, it unfreeze the system.

Amit Gupta · Accepted Answer

You cannot freeze all windows process. Since it contains some critical process that must run to work windows smoother.
However, you can achieve this by taking a form and set it to full screen and keep its TopMost property to true in timer tick event, so user cannot interact with other process.
Hipe it helps