Event ID 100 in Event Viewer

Question

After upgrading ITunes to version 10.2.2.12, I have been receiving error messages in my Windows 7 Event Viewer. The errors occur when the PC goes to sleep.  I realize I can disable Bonjour in Services but prefer to keep it enabled if possible. I am using the Apple Extreme Base Station and the Airport Utility cannot find the AEBS when Bonjour is disabled. I have tried reparing the Bonjour and ITunes installs but that did not help. Thanks in advance for any suggestions.
Details are below:
Log Name:      Application
Source:        Bonjour Service
Date:          4/26/2011 9:33:18 AM
Event ID:      100
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      User-PC
Description:
mDNSCoreMachineSleep: mDNS_Unlock locking failure! mDNS_busy (1) != mDNS_reentrancy (0)
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Bonjour Service" />
    <EventID Qualifiers="0">100</EventID>
    <Level>2</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2011-04-26T13:33:18.000000000Z" />
    <EventRecordID>26566</EventRecordID>
    <Channel>Application</Channel>
    <Computer>User-PC</Computer>
    <Security />
  </System>
  <EventData>
    <Data>mDNSCoreMachineSleep: mDNS_Unlock locking failure! mDNS_busy (1) != mDNS_reentrancy (0)</Data>
  </EventData>
</Event>

Answer 1

If the UPSA service is started then you could try using the
Forefront Synchronization Service Manager to troubleshoot the issue, it may shed some light on what is going wrong during the sync.  Have a look here for more information:
http://www.adventuresinsharepoint.co.uk/index.php/2014/05/15/user-profile-synchronization-not-working-with-active-directory-connection/