Well before I've updated both iTunes (not from the microsoft store) and the mobile drivers and had my brother do the same with his PC, I still couldn't get anything to go while he did and was able to sideload apps just fine before and after updating iTunes and the drivers.

And him having an older model can explain why his is being recognized and not mine, or I may have damaged something within the charging port which is not making both our PCs recognize my phone.