X570M Pro4 Sluggish Internet Connectivity

Suddenly, my computer is barely usable after years of great performance.
When the problem occurs, I encounter long delays in performance with web sites that require a lot of small interactions - like gmail search, or google docs, or even youtube. I have 1GB hard-wired fiber optic internet, speed tested and verified.
I have been working with Verizon and because I have another computer, an Asus laptop, also hard-wired to the same router, that experiences none of these issues, and they claim it is my computer. Strangely, when I reset the Verizon fiber optic "ONT" box, the problem is resolved - but for less than one hour.
I cannot figure out how resetting my network can so dramatically impact my computer, unless some kind of network buffer is overflowing. The processing power of the computer seems absolutely fine.
I see nothing wrong in the performance monitors - memory, drive, etc - all seem fine.
I flashed the bios up to 3.6 - no effect.
I ran in "performance" and "standard" - no effect. (motherboard utility)
I installed App Shop and updated all drivers (except for floppy since I have none and Realtek audio since audio is fine.
I've tried flushing the DNS. Running windows network troubleshooter. resetting the winsock catalog. no effect.
NOTE: I had, at one point, an error in the device manager - a bad PCI Encrypt/Decrypt. After I installed the latest and Chipset drivers from your site, this error went away - and now I have NO PCI Encrypt/Decrypt showing up in the device manager at all. Could that be related? Was this damaged or hacked?
I ran full Norton antivirus scans and Malwarebytes scans - found nothing.
Installed Intel LAN drives from asrock website - no effect.
I ran memory tests - hard drive tests - found nothing.
I tried fixing the DNS to 8.8.8.8 - no effect.
I changed network cables. I changed coax jumpers. I shortened their lengths from ONT to router to <10'. No effect
I disconnected everything I didn't need - all usb devices that aren't needed, Bluetooth dongle - no effect.

I'm kind of losing my mind. It takes 10 seconds to run a search within gmail when the problem is happening. When the problem is not happening - less than 1 second. 10 seconds to paste a small image into gmail. I frequently lose connections to google workspace servers - as if my connection is constantly being interrupted - but not my laptop. That is lightning fast. Only this ASROCK PC.

Bios 3.60
Ryzen 7 3800X 3900MHZ
32 GB 2x16 GSkill F4-3600C18D-32GTZN
Gigabyte nvidia GTX 1660 Ti
Samsung SSD 860 EVO 1TB
a boatload of fans. It's cool as can be.

I'm down to these possibilities:
1. I need a new motherboard.
2. I need to reinstall windows.
3. I need to uninstall Norton and use Windows Defender.
4. I need to try installing a PCI Network card.
5. I need to replace the Verizon ONT
6. I need ASROCK to come up with a brilliant easy fix. (please please let this be the one)

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Foolthrottle Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 08 Sep 2022 Location: USA Status: Offline Points: 35	Post Options Post Reply Quote Foolthrottle Report Post Thanks(0) Quote Reply Topic: X570M Pro4 Sluggish Internet Connectivity Posted: 09 Sep 2022 at 3:38am
	uninstalling NAV and Malwarebytes in favor of Defender made zero difference.

RLGL Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 29 Jul 2018 Location: MN Status: Offline Points: 2025	Post Options Post Reply Quote RLGL Report Post Thanks(0) Quote Reply Posted: 08 Sep 2022 at 11:24pm
	Try #3. I only use Defender, besides it is Free!
	Asrock Z370 Gaming K6,Intel i7 8700K, Asrock x570 Taichi

Foolthrottle Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 08 Sep 2022 Location: USA Status: Offline Points: 35	Post Options Post Reply Quote Foolthrottle Report Post Thanks(0) Quote Reply Posted: 08 Sep 2022 at 9:40am
	Suddenly, my computer is barely usable after years of great performance. When the problem occurs, I encounter long delays in performance with web sites that require a lot of small interactions - like gmail search, or google docs, or even youtube. I have 1GB hard-wired fiber optic internet, speed tested and verified. I have been working with Verizon and because I have another computer, an Asus laptop, also hard-wired to the same router, that experiences none of these issues, and they claim it is my computer. Strangely, when I reset the Verizon fiber optic "ONT" box, the problem is resolved - but for less than one hour. I cannot figure out how resetting my network can so dramatically impact my computer, unless some kind of network buffer is overflowing. The processing power of the computer seems absolutely fine. I see nothing wrong in the performance monitors - memory, drive, etc - all seem fine. I flashed the bios up to 3.6 - no effect. I ran in "performance" and "standard" - no effect. (motherboard utility) I installed App Shop and updated all drivers (except for floppy since I have none and Realtek audio since audio is fine. I've tried flushing the DNS. Running windows network troubleshooter. resetting the winsock catalog. no effect. NOTE: I had, at one point, an error in the device manager - a bad PCI Encrypt/Decrypt. After I installed the latest and Chipset drivers from your site, this error went away - and now I have NO PCI Encrypt/Decrypt showing up in the device manager at all. Could that be related? Was this damaged or hacked? I ran full Norton antivirus scans and Malwarebytes scans - found nothing. Installed Intel LAN drives from asrock website - no effect. I ran memory tests - hard drive tests - found nothing. I tried fixing the DNS to 8.8.8.8 - no effect. I changed network cables. I changed coax jumpers. I shortened their lengths from ONT to router to <10'. No effect I disconnected everything I didn't need - all usb devices that aren't needed, Bluetooth dongle - no effect. I'm kind of losing my mind. It takes 10 seconds to run a search within gmail when the problem is happening. When the problem is not happening - less than 1 second. 10 seconds to paste a small image into gmail. I frequently lose connections to google workspace servers - as if my connection is constantly being interrupted - but not my laptop. That is lightning fast. Only this ASROCK PC. Bios 3.60 Ryzen 7 3800X 3900MHZ 32 GB 2x16 GSkill F4-3600C18D-32GTZN Gigabyte nvidia GTX 1660 Ti Samsung SSD 860 EVO 1TB a boatload of fans. It's cool as can be. I'm down to these possibilities: 1. I need a new motherboard. 2. I need to reinstall windows. 3. I need to uninstall Norton and use Windows Defender. 4. I need to try installing a PCI Network card. 5. I need to replace the Verizon ONT 6. I need ASROCK to come up with a brilliant easy fix. (please please let this be the one)