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TCP/IP has chosen to restrict the congestion window for several connections due to a network condition.

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Why would Windows 8.1 log the following warning message. 

EVENT_TCPIP_TCP_CONNECTIONS_PERF_IMPACTED

TCP/IP has chosen to restrict the congestion window for several connections due to a network condition.  This could be related to a problem in the TCP global or supplemental configuration and will cause  degraded throughput.

-System
-Provider
[
Name]
Tcpip
-EventID4230
[
Qualifiers]
32768
Level3
Task0
Keywords0x80000000000000
-TimeCreated
[
SystemTime]
2013-11-30T03:31:59.345421800Z
EventRecordID2531
ChannelSystem
ComputerNoelC4
Security
-EventData
00000000010000000000000086100080000000000000000000000000000000000000000000000000

I'm seeing this logged very occasionally as a warning in the System Event Log.  Does it indicate something I should consider reconfiguring?  Is it transitory?

As far as I know, I was just using IE11 and listening to Pandora at the time of the most recent message.  Not sure but I don't think I was even watching videos at the time.  A speed test shows I have the full 21 megabit / 48 megabit speeds I'm expecting from our fiber service here.

  

-Noel


Detailed how-to in my eBooks:  

Configure The Windows 7 "To Work" Options
Configure The Windows 8 "To Work" Options


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