I checked that website and tested it, and from it I learned that the issue I am experiencing is called "chatter". From there, I went and found some software called Keyboard Chattering Fix, lowered the threshold down to 10, and now it seems to be working better. Not perfect -- there still is some chatter, but it seems at least now that I can use the keyboard. I am typing this message with the new keyboard now. The first time my browser randomly closed and I still had some chatter, but for this whole message there has been no chatter. Hopefully I won't see any more chatter going forward. Will come back to this thread if issues persist.
Thanks for the tip!
Regal