Monitor goes to sleep/loses connection, 15 min the mouse is not active

Hi
I have NVIDIA GeForce GTX 660 graphic card and BenQ GL2450 monitor. Recently my monitor started going into sleep mode (I thing it says "No signal detect") exactly 15 min after not using the mouse or keyboards. When I click on mouse after that, I get message "DVI: input" (or something like that) and I get signal again.

I checked Change plan settings and sleep mode is disabled. I also reinstalled all my NVIDIA drivers. I noticed in Device manage that I have Generic Pnp Monitor and I actually don't know what is it.

Hi i would check the sleep setting for the monitor again you might of been on the setting for the computer to sleep not the monitor.
and for the generic pnp monitor might need to install the software for that monitor. GL2450 | BenQ USA

Control Panel/System and Security/Power Options/Change plan settings

Turn off display Never
Put the computer to sleep Never

Change advanced power settings/Sleep

Sleep after Never
Allow hybrid sleep off
Hibernate after Never
Allow wake timers Enable

Change advanced power settings/Display
Turn off display after Never

From the link I installed software for GL2450 ant it is Display Pilot for Windows (only software there)

try a restore point before the problem started

The latest choice that a restore point give me is from just 3 days before today. Problem with my monitor started 3 weeks before. That is not helping me

I founded out what is the problem. My PC is infected with RAT virus from the last 3-4 weeks
I posted also one topic about that here