Windows 10: My computer acts like I'm holding down the down arrow key.

Ok, so just yesterday my computer started acting like I was holding the down the down arrow key. I naturally thought this was just a faulty keyboard problem, so I unplugged my keyboard, and it still did it. I tried turning sticky keys, it was already off. I don't no if I need to reset my computer, or if it's an easy fix.

:)

 

down arrow key stopped working

My razor lycosa down arrow key decided to not respond at some point today. The other ones work and so does the numpad arrow if i turn off the numlock. Sounds like its just broken and im screwed, but any suggestions?

 

Keyboard acts like i'm holding down CTRL key

My pc about a week ago started acting like I was holding down my CTRL key. I went and bought another keyboard, it didn't work, I also tried to reseting my computer, it didn't work, I also tried an anti virus, it didn't work, I tried contacting Microsoft
and they didn't help me.

Also sometimes my pc types 'cv' randomly

Please HELP

Restarting the computer works but for 30 minutes or so only

 

Make a shift key behave like an arrow key

I have a Windows 10 laptop with a keyboard designed by idiots. They tried to cram the arrow keys where they don't belong, with the result that the up arrow key is between the right shift key and the / key (US keyboard layout). This is one of the stupidest things the designers could have done, because it means that when I go to hit the right shift key (which is most of the time), I end up hitting up arrow instead. This is incredibly annoying.

I found a program called Sharp Keys which allows me to remap the keys such that the up arrow behaves as shift and the right shift behaves as up arrow. Now, at least I can type. However, I've now lost important functionality for the up arrow key. Up arrow (now labeled "shift" on my keyboard) doesn't repeat. So, I can't just hold the key down to move up. Instead, I have to hit the key repeatedly. How can I fix this, so my right shift key behaves like up arrow and my up arrow key behaves like right shift?

EDIT

Following a suggestion from the comments, I installed AutoHotkey. I have the following script:

I have the same problem as earlier. But, since AHK is a scripting language, is it possible to use it to change the repeat behavior?