That Facebook message your uncle sent you is just a hoax.
It's not going to give your computer a virus, but it is going to waste your time.
According to CBS affiliate WJZ, the bogus message, which has gone viral, says: “Hi…I actually got another friend request from you yesterday which I ignored so you may want to check your account."
It then instructs you to hold down your finger and forward it to all your friends.
Don't.