What is IIS APPPOOL\.NET ver ...

I suddenly acquired 2 lines under the "Sign Out" feature of the User picture in the Start screen:

IIS APPPOOL\.NET v4.5
IIS APPPOOL\.NET v4.5 Cl...

What are they and how can I get rid of them?

Many thanks in advance...
Peter

An Apppool (Application Pool) is a collection of resources allocated to a web site hosted under Internet Information Server (IIS) The idea being to isolate web sites from each other and prevent one faulty application from bringing down the entire server.

I have no idea why they showing up under signout, but you can see if stopping it/them makes any difference. I assume you've enabled IIS, so, go to Administrative Tools/Internet Information Services (IIS) Manager. In the navigation pane expand the tree to show Application pools. In the middle window select the application pool(s), right click and select stop. See if they're removed from signout.