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Hi Philip,
They were giving me errors. Turned out I had somehow borked my Windows 10 permissions. Tried to fix them to no avail. Had to do a time-consuming full Windows reset.
It is all working...

Windows 10 x64 20H2 build 19042.685.
I am the Administrator run the program as Administrator.
I ran the Optimizer again and selected the optimal settings. The program indicates it is going to...

I updated to v4.1.1 and the General Settings tab no longer reads the following values: (they are blank). TCP Window Auto-tuning, Congestion Control Provider, RSS, RSC, ECN Capability, TCP Chimney...

CUBIC is now the default in Windows 10 (since the April 2018 v1803 update).
I would like to think Microsoft have made this change for a good reason.
I have switched between CTCP and CUBIC to test...

My Windows 8.1 WMI was indeed really messed up. Microsoft's wmidiag.vbs confirmed multiple registry entries were missing.
The fixes I tried didn't work, so I did a clean install of Windows 8.1. WMI...

My conection runs at about 112Mbs and Optimizer set "Experimantal" when I run it.

However after reboot netsh int tcp show global shows Receive Window Auto-Tuning Level as "normal".


The...

Thanks for your reply Philip. Your comments make sense.

I was looking at values as displayed by the Optimizer.

Out of curiosity, I will do the PowerShell/netsh/Regedit thing when I get a...

Hi there Philip,

I have tried Optimizer 4.0 on Windows 8.1 64-bit and here is what happened.

Most of the tweaks on the "Advanced Settings" tab did stick after reboot. The only two that didn't...

I don't understand why TCP Optimizer hasn't been updated to work with Windows 8 and 8.1.

Well, it is a year and a half since 5-Feb-13.

1. Does TCP Optimizer work on properly on Windows 8.1?

2. If not, will TCP Optimizer ever be updated to work on Windows 8.1?