Windows 10: After 1803, AV system is microstuttering every few seconds

I installed the 1803 update a few days ago, and as soon as it had rebooted, I found that YouTube videos would "stutter" every few seconds. For a fraction of a second, everything freezes up and the audio makes a buzzing sound, like a cell phone on vibrate but lower pitched. What I think is happening is that the computer is doing the Max Headroom stutter (remember when computers did that when they tried to play videos?) but extremely fast. I've experienced that before, playing games on a computer whose video card was failing. I then attempted to play a game and listen to an MP3 in Winamp, and they both had the same issue. It's not just the audio; by smooth-scrolling a long webpage while an MP3 was playing, I've confirmed that the screen also freezes during these hiccups. It's almost as if something is stealing CPU clock cycles, but that sounds ridiculous even to me.

I know the issue is specific to Windows somehow, because this computer is a dual-boot with Linux, and I'm able to watch videos, listen to music, and play games in Linux just fine.

:)

 

System logs out after a few seconds

No matter what Power & Sleep settings I use my computer screen goes blank after a few seconds and I have to log on every time. Is this a known problem?

 

flashing box every few second

I have problem with a flashing box every few seconds since I installed windows 10

 

I have exactly the same problem after 1803 install. I spent over an hour with Microsoft telephone support. The tech kept insisting the sound issues was because the HP system on board sound system was not supported on Win10. I pointed out I was using a USB sound device but he would not listen and wanted to close the ticket.

I think something is pulling large amounts of CPU and that the issue was NOT the sound system at all but just a visible result of the root cause. I would not close the ticket and will try going back to previous build. I will call Microsoft again to see if they can help me solve the issue.

 

I FOUND AN IMPORTANT CLUE
I recently backup the disk for the 1803 version by using Paragon Disk Copy. I tested it by booting from the copy on an eSATA disk interface so I would not have to open the case and switch drives. It booted just fine AND the sound works just fine. I think it has to do with the disk interface because when I did open the case and booted from the regular SATA interface, it booted just fine BUT the sound was back to stuttering.

DOES ANYONE HAVE ANY IDEAS WHAT IS CAUSING THIS?