Crackling noise and microfreezes

For the record - I have a P775DM-3, but I believe it is not exactly model-specific.

Recently I started having microfreezes with crackling noise when I use my Internet connection. It happens without fault when I open a new page/site. At this point I'm almost sure it is related to the network cable/card, but can't locate the exact source.

What I tried:
-Clear dust (blow some air, but I don't know where exactly I should, outside of the ethernet port; my laptop is pretty clean in general).
-Unplugged all cables, removed battery, pressed power button for 30s (attempt to remove static electricity)
-Tested with speakers and USB headphones - happens in both cases

I haven't yet tried to replace the cable, but I don't have a replacement available for some more time.

Do you have any ideas what exactly it can be and how to fix it?
Any help is very appreciated.

 

Is this only happening when you are on your home/work internet connection, or does it happen on any connection? Is it just in a specific program or browser, or happening across the board?

 

I can only test it with my home connection. It is any program that plays sound. The moment I do something that uses the internet connection there is interference. This is very well pronounced if I disconnect and reconnect the ethernet cable. If I use Wi-Fi the noise is much, much lower (almost unnoticable) and not as frequent but it still occurs (around 30% reproducibility when loading pages).

 

Please run Latencymon (I think that's what it's called?) and check your DPC latency when sound is playing when you're doing this browsing.

 

Did you try uninstalling and re-installing the audio drivers/software at all?

 

Looks pretty bad tbh...
I'll try to disable WLAN and see what happens. Previously it didn't cause any problems.

/edit I've disabled everything except my current LAN adapter and it still gives me similar results.

 

Yeah you gotta fix that. Hope someone else can help you with that (I don't know how). Those values are way off the mark.

 

So, I've reinstalled the drivers, and it seems to have fixed the issue. Thank you for reminding this step

Nevertheless, LatencyMon still doesn't like something in my LAN adapter, looks like there is still some problem, although it is not as evident and at least is not normally noticable.
Here are 2 screenshots I've taken - first one is with the ethernet cable disconnected and all network devices disabled.
The second one is with clean install of LAN driver from Clevo website.