LetMeWatchThis.com does not host, provide, archive, store, or distribute
media of any kind, and acts merely as an index (or directory) of media
posted by other webmasters on the internet, which is completely outside
of our control.

So maybe one of the referenced sites your son went to was unsafe?

Try system restore if you can't get it working. But it can be a totally unrelated issue also.

Kees