I have an issue with my keyboard (Japanese Keyboard but I am sure it has nothing to do with localization). Whenever I use my Del key (delete key) that isn't in the numpad, it does nothing. And when I am editing a text and use the arrow keys (Left and Right), the cursor (caret) moves to the beginning of the line or to the end respectively.
I had that issue in the past I don't recall what key combo I should press to fix this.
My keyboard is a Sanwa SKB-BT22BK (I am pretty sure it's not a hardware or keyboard firmware issue but I'm writing the reference just in case).
The OS is Windows 10.