Misc: What computer company TV ad showed a woman throwing a javelin through a TV?

Questions

What band in the late 80's were exposed for not recording their own hits?

What band performed "roll over lay down"?

What band performed the classic single "all right now"?

What band played to 2.5 million people in 37 countries on its 1993 keep the faith tour?

What band sang the 80s song "walkin' on sunshine"?