Possible problems with the screen and touchpad. Sometimes USB ports stop working, especially when they are handled carelessly, roughly pulling out the peripheral instead of carefully pulling it out (the same applies to other types of ports, they are just used much less often). There are many reasons and problems. As for the electronic filling, here, as practice shows, everything is less stable. Usually, if such components as a processor or memory have worked for more than six months, then nothing will happen to them without external influence. After long-term use, you will probably need to replace the battery, since the service life of the latter is noticeably reduced over time. And after a couple of years, the battery, which once provided three or four hours of operation, barely lasts for half an hour. However, in this case, the entire repair is reduced only to the search and purchase of a suitable battery model. But no matter what the breakdown, it is better to entrust the repair not to the neighbor's son, even if he is considered a cool computer guy, and even a hacker in addition, but to a professional. Moreover, nowadays it is not so difficult to find a person or a company that specializes in the repair of desktop computers and laptops. In this case, all work will be performed not only quickly, but also qualitatively. They will be covered by the warranty and you can be sure that everything was done correctly. And after all, the repair that is necessary after an incorrect repair can be much more expensive, especially if the purchase of new components is required.
And remember - careful and careful handling of such delicate equipment as a laptop or netbook will allow you to avoid sudden repairs. Although, unfortunately, even this does not solve all problems.