My computer was freezing after booting. Within minutes after submitting a request on Thumtack, Cesar gave me a very competitive quote, which I agreed to. We set up an appointment to pick up the computer. He came promptly on time. He delivered it the very next day all fixed up. It turned out that the BIOS and few drivers needed to be updated. Excellent work, prompt, reliable, and very professional. I would certainly use him again and refer him to anyone. How refreshing to deal with competent and professional people!!!