If there are indications of hardware damage or internal software problems
a good idea would be to return to the point of retail sale and see if they have
authorized Apple trained service providers. If from an official Apple Store,
the identification of the computer should be easy; the serial number & model
numbers are in your sales documentation.
And if the question is about performance, concerns about adware, odd issues
when trying to use the computer, then please re-state the issues in a question.
The two links to Apple Support previously posted (SMC reset, etc) are good
for a start if followed, as part of a troubleshooting method. If you are looking to
try fix an issue. You'd do well to describe the problem more exactly and also
be able to identify your exact computer model.
Apple ID is usually the same email address used to post to these discussions.
Good luck & happy computing! 🙂