Here is a list of steps to help prevent your computer from freezing or crashing:

1. Check that your computer is running the latest operating system updates.
2. Check that your antivirus software is up to date.
3. Scan your computer for viruses.
4. Check for dust accumulation and clean your computer.
5. Check the temperature of your hardware components.
6. Check if your computer has sufficient RAM and disk space.
7. Disable unnecessary startup applications.
8. Check for driver updates.
9. Uninstall unnecessary software.
10. Perform a disk cleanup.