I contacted Mtech for computer maintenance and, unfortunately, was disappointed. At first, they promised me a quick fix for the problem, but in fact everything dragged on for several days. When I took the computer away, it turned out that the problem had not been solved, and besides, there were new malfunctions. The service leaves much to be desired: the staff are not competent enough, they could not give clear explanations about the identified malfunctions. In addition, calls and messages were not answered on time, and when visiting the store, the service was rather superficial and unfriendly. I am very unhappy with the service, and I will no longer contact this store.
It's good that they returned the money, but they said that there was a malfunction in all my components, but the normal master (who turned out to be a friend) realized that the case was not clean. He just changed the RAM and there have been no problems for over a year now.
You are not masters of your craft, and the prices are like those of professionals.