Final answer:
If you delete photos from your hard drive, use data recovery software to attempt to recover them, stop using the computer to prevent overwriting, contact tech support if needed, and set up regular backups for the future.
Step-by-step explanation:
If you accidentally delete all your favorite photos from your computer hard drive, the best course of action would be to use data recovery software. This type of software can scan your hard drive for "lost" files and potentially recover them. It is important to stop using the computer immediately to avoid overwriting the space where the photos were stored, as this can make recovery more difficult or impossible. If you're not comfortable with attempting the recovery yourself, contacting tech support for guidance would be the next best step. It's also a good moment to consider setting up regular backups to prevent such losses in the future.