Restarting your computer might help fix any small software issues that might be causing your keyboard to type multiple letters when you press a single key. Upon restarting, test your keyboard again in a word processor like Word or Docs.

Restarting your computer won't resolve key bounce. Dell techs would like you to think it will though. 

I mentioned above that I'd had the same problem, for which I had to install a program that blocks the behavior from happening. I've restarted that computer hundreds of times, and even installed a fresh OS on a fresh SSD. 

The defect is in the hardware. 

Thanks. By hardware defect, do you mean a keyboard mechanical problem or a bad ribbon cable or something like that? It sure seems like a windows or driver problem. It's intermittent. Working great ok right now but it's unpredictable as to whether the chatter problem happens. It's not just a chatter problem, sometimes a key press won't register either. Restarting doesn't help but it seems like if I type for a while it will start working ok.
I have a USB wireless handheld keyboard that seems to work fine.

I'm considering the keyboard chatter blocker but for now it's working fine.

Hi, I have the same problem. Please explain a solution. 

Still no solution found. I'm just living with it.

Status update.

After many attempts to reinstall Windows using Dell SupportAssist I gave up. I would get to a SupportAssist loading screen that never progressed beyond loading. I tried uninstalling SupportAssist, but after reinstallation it still wouldn't work. Nothing provided from Dell for a factory reset worked.

I did a local recovery using Windows Restore. That worked fine and the keyboard worked well for a while, then started not working again.

It's the keys in the qwertyuiop row that don't work right. Backspace and enter don't always work either.

I decided to eliminate any conflicts that might be coming from corrupted software, incompatible drivers etc by buying a new SSD starting over. So, I bought a new SSD. It's a Samsung 970 EVO Plus. NVME M.2 1TB. Installation was pretty easy, there's a YouTube Video. The new SSD wasn't recognized after installation. Windows install suggested a driver needed to be installed. I could not figure how to get the driver installed. I downloaded the driver from Samsung and put it on a USB stick but Windows couldn't find it. I Changed a BIOS Storage setting from RAID to ACHI/Me and the new SDD was found by the Windows installer.

I got the Windows 10 image I used to load Windows from Microsoft. Didn't trust anything donloaded from Dell after multiple attempts to get anything they had to work.

After Windows 10 installed, I was prompted to enable wireless access. I was prompted to set up a fingerprint on my fingerprint reader.

Keyboard was working fine for a while, then it started malfunctioning again. I also found that logging in with my fingerprint wasn't working either.

I started typing this with a USB Dell keyboard. No problem, I started using the laptop keyboard again and now it's working good.

So, I've eliminated corrupted software on my original SSD.

The only software I've installed so far is Mozilla Thunderbird email and Firefox browser.

Problem is good for now but has been intermittent.
I'm tempted to go back in the computer and reseat the keyboard cable.

I have trouble believing it's a bad keyboard because of the intermittent nature of the problem.