BLUE CIRCLE WATERMARK on some softwares

Hello

MSI PE60 6QE Laptop
Windows 10 Enterprise x64
Geforce 960M
Screen Resolution : 4K

Recently I installed "Technisat DVBViewer TE2" and when I ran it, I saw a blue circle watermark on right side of it screen when playing channels.
I thought it is because it is a Free software and watermark is related to license stuff.
after that I uninstalled DVBViewer BUT I see that watermark on other softwares on my system too, like : Xilisoft Video Converter, Andyroid Android Emulator, Droid4X,
but it is NOT on the WMP and KMPlayer.

I thought installing KLite may solve the problem, and installed Mega pack, but the problem still persists.

Please help me how to remove this watermark.

I have never seen that before. It is certainly not caused by a codec. Another application must be adding the watermark. That logo seems to contain the letter N, maybe that gives a clue with regard to recently installed applications.

Check the Task Manager (Ctrl+Shift+Esc) and see if there are any suspicious processes running.

That watermark is caused by a program called Nahimic Soundtracker. It is an application that came with your computer.