(This should be in the cooling section, but anyway...)
I don't think you should bother bringing it to a professional so fast. Just run a background program that hogs the CPU (Here's a good one:
http://www.majorgeeks.com/Toast_d867.html. Run 2 or 3 at the same time to get your CPU at full load). If it crashes, you may have a heating problem (other problems may be in play, but lets not worry about it. Yet). Monitor the temperature while the program(s) are running, and post back here.
Or you can just refer to the temps above, and if its above that, you have a problem.
If its close, you might want to have it looked at, or if there is no problem with the computer you can just leave it alone.
Another reason why it can be that high may be the position of your computer. Has it been seeing alot of sun? Especially with a black coloured case, you can get increased temps with your comp in the sun.
Or maybe an enclosed area under the desk? No space for hot air to escape will show rising temps.
From experience, most branded computers (by branded I meant built by big name companies) should have no problems with temps, assuming all fans work. They're built to be as trouble free as possible.