Control Keys Not Working

Hey, I'm having troubles with the control keys on my laptop that are a bit unusual. They don't work, but in a strange way. I'll try to explain best I can.

First, I'm running Windows 7 64-bit on a Dell Inspiron N5040 Laptop. Hopefully that should help anyone diagnose the issue.

When I hit my left control key, instead of working as control, it acts as the following keys (special keys denoted in brackets): 8=-[Home]65[Help]
When I hit my right control key, it acts as the following keys: [Enter]\,.56-mvxzc
In both cases, when I hold down the key for long enough, it will end up hard-booting my computer.

This is a strange case of malfunctionality. I don't know if it's hardware or software, but either way it isn't working. I read somewhere to try hitting Alt+Ctrl+Fn, which when I did the first time seemed to work, at least briefly. But when I started my laptop again, it went back to malfunctioning. Does anyone have another solution? Or do I need to replace my keyboard? Thank you.