There are a few things you can do to try to fix a noisy laptop fan:

1. Clean your laptop. Dust and debris can build up in the vents and fan, which can cause it to make noise and overheat. To clean your laptop, use a can of compressed air to blow out any dust and debris. Be careful not to spray the air directly into the fan, as this could damage it.
2. Make sure your laptop is well-ventilated. If you’re using your laptop on a soft surface, such as a bed or pillow, it can block the vents and cause the fan to overheat. Make sure to use your laptop on a hard, flat surface so that the vents can flow freely.
3. Close any unnecessary programs. Running too many programs at the same time can put a strain on your laptop’s CPU and cause the fan to work harder. Close any programs that you’re not using to reduce the load on your laptop.
4. Update your laptop’s BIOS. The BIOS is a low-level program that controls your laptop’s hardware. Sometimes, outdated BIOS can cause problems with the fan. Check your laptop manufacturer’s website for the latest BIOS update and install it.
5. Replace the fan. If you’ve tried all of the above and your laptop fan is still noisy, it may be time to replace the fan. You can purchase a replacement fan online or from a computer store.