The computer repair expert generally works on the basis of contract and it is better that they do so
. If at all you ask them to charge you on their every visit then you will have to bear a huge loss in monetary terms. But if they are in a contract they will not charge you for every visit of their. You can call them anytime in between that contract period. They are not liable to take any money for their service. If at all they had to fix any part in your computer then yes you will have to pay money just for that particular thing. Not for their service. So all in all it is a beneficial option to hire a good Boston pc repair service in your county.