If your computer keeps freezing during startup, try the following steps:

1. Check for any new hardware components attached to your computer and disconnect them, if possible.
2. Try to boot into safe mode and see if the system is still freezing.
3. Check for any new software installed before the system freezing began.
4. Check for any defective hardware components and replace them with working components, if possible.
5. Perform an anti-virus scan to check for malicious programs.
6. Update your computer BIOS to the latest version.