Q: Itunes does not recognized ipod classic windows 10

Watch the iPod's screen when you connect the iPod.  What does it say or do, if anything?  Does it acknowledge being connected?  Does the battery charging indicator appear?

Your profile says MacBook Pro, but if you are connecting iPod to a Windows PC, I assume it is formatted for Windows (not Mac).

IPOD screen reads do not disconnect.

That's good and makes things easier.  That means the iPod does have a data connection to the computer's system.  iTunes is just not seeing it for some reason.

If you have not already since updating to Windows 10, you may want to download the latest iTunes from Apple

http://www.apple.com/itunes/

and install it again over your current installation.

Then you may want to follow this procedure to completely remove iTunes and then reinstall

Remove and reinstall iTunes and related software components for Windows 7 and later - Apple Support

This is Apple's general trouble-shooting document for iPod being recognized by the system but not appearing in iTunes

iPhone, iPad, or iPod not recognized in iTunes for Windows - Apple Support

Some of it are things you already tried.

You can also try putting the iPod into Disk Mode

Putting iPod into Disk Mode - Apple Support

After putting iPod into Disk Mode, connect to computer running iTunes.  If iPod is recognized by iTunes, it may prompt you to do a Restore with a message about "recovery."