I had a problem with it starting, a few days before the Warranty expired.  I wrote to the company and explained it, and they promptly answered and said to return it so they could repair or replace it.  The tech offered a suggestion for me to check first, which I did.  That wasn't the problem, but it helped me stumble on the real problem which was that I overloaded the USB connections with a 7-port USB hub along with filling all the other ports.  It did not take long to spot the problem and fix it.I am extremely happy with the computer as it does what I wanted and now works perfectly.The company could not have been nicer to deal with.