LDAP Bind failure / GroupPolicy 1006 / ErrorCode 81 (on one workstation only)

Multiple domain accounts on this same workstation yield the same error; those same accounts on other workstations sail through with no problems.

It's occurring intermittently: roughly about 9 out of 10 queries fail, but rarely (with decreasing frequency of late) sometimes one goes through right away. Otherwise, sometimes it does work but can take on the order of ten to thirty minutes to get a reply.

It's pretty plain that it's a client-side problem. Win8.0=>WSE2012

Here's the System Event Log XML:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-GroupPolicy" Guid="{AEA1B4FA-97D1-45F2-A64C-4D69FFFD92C9}" /> 
    <EventID>1006</EventID> 
    <Version>0</Version> 
    <Level>2</Level> 
    <Task>0</Task> 
    <Opcode>1</Opcode> 
    <Keywords>0x8000000000000000</Keywords> 
    <TimeCreated SystemTime="2015-03-21T22:47:59.416177300Z" /> 
    <EventRecordID>97988</EventRecordID> 
    <Correlation ActivityID="{AB4A4C93-02DE-486F-A27C-715DE5C01BC3}" /> 
    <Execution ProcessID="956" ThreadID="5172" /> 
    <Channel>System</Channel> 
    <Computer>FACILITY1.OIT.local</Computer> 
    <Security UserID="S-1-5-18" /> 
  </System>
  <EventData>
    <Data Name="SupportInfo1">1</Data> 
    <Data Name="SupportInfo2">5740</Data> 
    <Data Name="ProcessingMode">0</Data> 
    <Data Name="ProcessingTimeInMilliseconds">278547</Data> 
    <Data Name="ErrorCode">81</Data> 
    <Data Name="ErrorDescription">Server Down</Data> 
    <Data Name="DCName" /> 
  </EventData>
</Event>

How to begin troubleshooting/fixing this? Google isn't turning up much; I'm a part-time Reluctant SysAdmin who knows what the acronym LDAP stands for, but not much more than that.

March 21st, 2015 8:45pm

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