The computer makes an almost constant noise - sounds like a loud window A/C. It's an up and down sound, mostly up, like a vacuum cleaner. Drives me crazy. I've run the Dell check - the 25 minute one - and they didn't find anything. I thought it might be a cooling fan?? Sometimes when it is at its loudest, it takes a while to open a website or an e-mail message. This is a 4-1/2 year old unit.
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