Solved! Right control key is inputting the / instead

Solution
Laptop internal keyboard? If so, you can try reseating the cable at the motherboard's connection. It's, possibly, a problem with the key matrix, in which case the keyboard would need replaced.

smeccleston

Prominent
Aug 14, 2017
2
0
510


Yes internal keyboard. HP envy x360. Can't see how to "reseat" the cable. No visible screws or clips.