Hi Mollie W
I’m Segunfunmi, an Independent Advisor and Microsoft user like you. Thanks for posting the query here in this forum.
There could be several reasons why your computer is blocked and making a loud noise. It could be due to blocked air vents, running demanding software, a malfunctioning hard drive, using outdated drivers, or viruses and malware. It could also be due to dust accumulation on vents or fans, not enough ventilation, or physical damage.
You can try to check and clean air vents, provide proper ventilation, run a hardware diagnostic test, and update the BIOS and device drivers to fix the problem.
I hope this helps! Is there anything else you would like to know?
Best regards segunfunmi