How to disable Flash in Internet Explorer (10/11)
In IE 10/11, go to the upper right corner and click on the Tools Menu (cogwheel icon). Click on Manage add-ons.
In the bottom left change the “Show” options to “All add-ons” and look for Shockwave Flash.
Right click on the “Shockwave Flash Object” and click on Disable.
Remember: Flash is a buggy add-on. Update it but try to keep it disabled unless you really need it (most cases you won’t).
To disable Flash Player in Chrome or Firefox see: Disable Flash on Chrome and Firefox