I noticed that lately my Sony notebook makes a high pitch sound for a short moment twice in a role and when this happens my PC laggs each time I hear that sound. This happens when I' am on using internet explorer and when it's loading the website. I wonder if this is my hard drive or something else. I hope nothin bad will happen. I currently using the Sony PCG-R505ESP notebook and I do take care of it even it's 8 years old. Btw this high pitch sound is very small sound. You can hear it when the room is quiet.
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8/26/10 at 8:15pm