ITunes will not recognize iPad, tried everything?

My mom's PC, running Windows 10, has iTunes. She is a member of music groups, and her music is in iTunes. Unfortunately, iTunes will not recognize the iPad, but Windows 10 immediately opens a window with its contents. Both Apple's support page and Apple themselves could not solve the problem. They said to check third-party software, which we did. We've tried everything from simple (another port or cable) to more advanced (Startup Repair, System Restore, etc.) Clean Installing will have to wait for now. Her other Windows 10 PC, an XP computer originally, has the exact same version of iTunes, working perfectly. Issue is, that is an old PC, so it is slow. Sfc found nothing.
Any suggestions?
Added (1). iTunes version - latest
Old PC - Some Toshiba, 32-bit, 1.50 GB RAM
New PC - HP 15, 64-bit, 6.00 GB RAM
Added (2). Just checked - Toshiba is Satellite M100

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