The noise is definitely coming from the laptop because it varies with processor activity. Like when I open a folder in Windows Explorer, it goes kkkkkh while it's opening and then goes back to the background pops and crackles when it's opened. It makes a lot of weird squeaks and whistles while Windows closes down and when it's finally closed all is silent. I only mentioned the PC because it has a similar problem to the laptop, like when I listen to or record anything on the sound editor you can hear ch-ch-ch-ch as the cursor sweeps across the graphical display window and obviously the noise is included on the recordings.
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