Final answer:
Regular computer maintenance should involve removing unwanted files, rebooting the computer, backing up data, scanning for viruses, and deleting browsing history to maintain the system's health and performance.
Step-by-step explanation:
To perform regular computer maintenance, Gabby should take several important steps. Firstly, she should remove unwanted files which will help free up disk space and potentially improve her computer's performance. It's also a good practice to reboot the computer occasionally because this can resolve many temporary issues by resetting the computer's state. Secondly, Gabby must back up her data regularly to prevent data loss in case of hardware failure or other issues. Another crucial task is to scan for viruses using reliable antivirus software to protect her computer from malware and other security threats. Lastly, deleting the browsing history can help protect her privacy and also free up some disk space if the browser's cache is full. Overall, these steps will help maintain the computer's health and performance.