Noise While Using Computer

Suddenly when I use my computer to go on the internet, I hear a loud noise. This happened once before but suddenly disappeared. I wonder if the fan could be bad . Any ideas on what is causing this? The only other time I hear this is when my computer is near the end of Norton fuul scan. This was bought in 2009 so is an old computer.
Holly
HP Slimline s3700y PC
Windows Vista
PS Right now I'm not hearing the noise, but most of the time I hear the noise when going to different websites.
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Hi Holly:
Welcome to the HP forum. The noise you hear could in fact be the fan. I have attached a troubleshooting document for you to try. Please let me know if this resource resolves your issue.
Reducing Fan Noise (Windows Vista)
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&dlc=en&docname=c01474069&lc=en&jumpid=reg_r1002_us...
“I work for HP.”
***Please mark Accept As Solution if it resolves your issue***
I am an HP employee.
Say "thank you" by clicking the Thumbs Up button in the post that helped you.
Please mark the post that solves your problem as "Accepted Solution" so others will benefit from the solution!

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Hi Holly:
Welcome to the HP forum. The noise you hear could in fact be the fan. I have attached a troubleshooting document for you to try. Please let me know if this resource resolves your issue.
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http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&dlc=en&docname=c01474069&lc=en&jumpid=reg_r1002_us...
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Message was edited by: EduardoBoucas

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