If your fan is running loud or the computer shuts down randomly:

Unplug USB drives, printers, external hard drives, and cameras. A faulty USB device can prevent booting.

Make sure air vents are not blocked by dust or blankets.

If you ask for help in a forum, always give your PC specs (CPU, RAM, GPU) and describe the exact symptoms! If you are still having trouble, let me know:

Always use a laptop on a hard surface, not a bed or couch.

Use Windows Security to perform a full system scan for malware. Phase 3: Overheating & Loud Fans