A software that i can implement on network or individual PC that will allow them to lock after certain period of inactivity but keeps the display on. For example i'm doing a presentation and I end up walking away from my computer for a bit i want the pc to lock but keep whatever that is on the display on.
OK, the last time I dealt with Windows and such was Workstation 4 and 2k, just edging into XP. But this should work
First, you need some way of grabbing the screen image every X amount of time, say every 1 minute, and automatically and saving it with a static filename - say,
c:\desktop_screen.png. A quick search makes this look promising - https://blogs.msdn.microsoft.com/matthew_van_eerde/2011/11/29/programmatically-grabbing-a-screenshot-of-the-primary-display/
Then simply set the lock screen image and screen saver to be that image. Apparently it has to be by-user - https://winaero.com/blog/how-to-change-default-lock-screen-image-in-windows-10/
A little more digging around shows that using the Task Scheduler from Win 7 up allows you to create your own timing event, which can include locking the screen...