I'm not sure I understand your question, but Windows Explorer using the pagefile is very normal.

Putting it simply the pagefile is like extra memory (RAM) so that if your computer runs out of real physical memory it will start using the pagefile for memory (this is also known as virtual memory). It does this so instead of the the computer just crashing because it ran out of RAM it expands onto the hard disk instead. It's not so much of an issue these days as most computers have 4GB+, but if the computer is constantly relying on using virtual memory then it'll also be much slower because of it (disk based RAM is a lot slower than actual real RAM).

However, just because Windows is using the pagefile doesn't actually mean that your computer has actually run out of real RAM, depending on how much RAM you have in total (and also how much is free/unused) it may dump some of the memory that you haven't used in a while into the page file freeing up the available memory so that when you want to do something else, it'll be instantly ready to go. If you do want to use that old memory again though it'll automatically move it back into active memory (It's a bit more complicated than this, but this is the basic gist).

I also don't recommend changing the virtual memory settings (or disabling it completely), Even with 16GB+ Windows expects to have some buffer space in case it runs out and some applications (badly written ones...) won't even run without having a pagefile because they think you might run out of RAM/crash. The default "System Managed" has been refined many times over the years and it's pretty efficient now so it's best just to leave it be.

So basically don't worry about it, pagefile usage by Explorer is very normal.