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Video/audio problems, glitching etc

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Hello,

Dear community members, I have a problem with audio/video glitching on my notebook. Recently I've pulled out my HP DV8 1110sw (specs on the bottom) because I had to return my company notebook. I took it apart, cleaned it, changed the thermal paste, upgraded ram from 4bg do 8gb, and upgraded one of my HDD's to an SSD. I installed Win 10 Pro 64bit, all of the drivers were installed by windows update service. I installed all the newest codecs etc. By then I wanted check if everything is ok, beginning from winamp - the sound of various tracks was fine. So then I went to Netflix and when I pressed play on a first tv show there were weird sounds and cracks coming from the speakers making actors sound like R2D2 while at the same time video was lagging a bit. I've tried different browsers - Opera, Firefox and Chrome, nothing helped. So the I tried reinstalling drivers and codes by hand, flash players, silverlight etc. - didn't help either. I thought that it might be some kind of surge on the power supply unit so I disconnected it, while working on the battery only - still nothing changed. Changed power settings to maximum efficiency. Turned on/off optimizing audio/video. Considering that the notebook was made to work with Win7 i tried to install drivers for Win 7 in compatibility mode but nothing changed. I need some advice what else I can do/check to fix this problem. I paid a lot for this notebook and I really want to make it work correctly.

Specs
hp dv8-1110sw
Screen: full hd 1920x1080p 18"
Chipset: Intel HM55
Processor: Intel i7 720QM
Graphics card: NVIDIA GeForce GT230M
Ram: ddr3 8gb (oryginally 4gb)
Drives: 120SSD, 500gb HDD (oryginally x2 500gb HDD)
System: Windows 10 Pro (oryginally Windows 7 Home Premium 64bit)
 
Internet connection is fine, there was only 1 browser open at a time. I tried a full hd movie on VLC player - it sounds fine, the problem is when i use netflix or twitch. I haven't tried any games yet. Also the worst cracking sounds are when i start playing netflix, after a while it calms down a bit but not entirely.
 
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