We recently heard about the goverment building is leaking and need to repair. It's because a leak of mantenance work. It must be cost a lot to goverment money. It's same about computer, if we don't do a maintenance. The computer lastly will go beserk.
So, how to do a computer maintenance. Is it will cost you a lot of money. I think it is not a big problem. Just do a simple maintenance such cleaning your mouse, keyboard, system unit and other part. It is a hardware part.
For software part, you must do a Windows Update and Antivirus Update regularly. You also need to do a backup/ If the problem comes, an it will not save by doing maintenance. Lastly you have to recover or roll back your data from a backup data. That's why computer maintenance is important.