What'd you expect?

There's a difference between a discount store who throws together a raggamuffin team of kids with computer skills, and a professional paid adequately for their skills and reputation.

I won't even go into the bad judgement of buying a system at bestbuy or taking it back to be fixed, let alone storing sensitive, err, data, on that system then handing it over to a stranger.

You might as well put a fly-strip in the kitchen then curse at the flies for landing on it.