I'll bet no links work at all. How about this one? http://sumrandomguy.com
I bet you had a browser installed and it made itself the "default browser" and you later uninstalled it. Or you had malware that intercepted your browser links.
Open your favorite browser and go into its settings. Somewhere in there is an option to make that browser the default browser. Turn that on. Once you do that, I bet you can open links again just by clicking on them.