Event log error - The print spooler failed to load a plug-in module

[mpw101]

Using a HP Officejet 6500A Plus e-All-in-One Printer - E710n on HP p6-2036c desktop with Windows 7 sp1 64bit operating system.  I keep getting the following error:

Log Name:      Microsoft-Windows-PrintService/Admin

Source:        Microsoft-Windows-PrintService

Date:          9/27/2012 5:24:41 PM

Event ID:      808

Task Category: Initializing

Level:         Error

Keywords:      Print Spooler

User:          PC-1\mpw

Computer:      PC-1

Description:

The print spooler failed to load a plug-in module C:\Windows\system32\spool\DRIVERS\x64\3\UNIDRVUI.DLL, error code 0xc1. See the event user data for context information.

Event Xml:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

  <System>

    <Provider Name="Microsoft-Windows-PrintService" Guid="{747EF6FD-E535-4D16-B510-42C90F6873A1}" />

    <EventID>808</EventID>

    <Version>0</Version>

    <Level>2</Level>

    <Task>36</Task>

    <Opcode>12</Opcode>

    <Keywords>0x8000000000020000</Keywords>

    <TimeCreated SystemTime="2012-09-27T22:24:41.608214200Z" />

    <EventRecordID>43</EventRecordID>

    <Correlation />

    <Execution ProcessID="4380" ThreadID="4984" />

    <Channel>Microsoft-Windows-PrintService/Admin</Channel>

    <Computer>PC-1</Computer>

    <Security UserID="S-1-5-21-3612470729-1209232338-4090296887-1000" />

  </System>

  <UserData>

    <LoadPluginFailed xmlns:auto-ns3="http://schemas.microsoft.com/win/2004/08/events" xmlns="http://manifests.microsoft.com/win/2005/08/windows/printing/spooler/core/events">

      <PluginDllName>C:\Windows\system32\spool\DRIVERS\x64\3\UNIDRVUI.DLL</PluginDllName>

      <ErrorCode>0xc1</ErrorCode>

      <Context>112</Context>

    </LoadPluginFailed>

  </UserData>

</Event>

I have no problems printing from the wired desktop or the wireless notebook. But every time I print something this error appears in the Print Service Event log.

[mpw101]

I uninstalled the Basic Device Software and reinstalled it and the above error went away. 

Now I have a new one.  Every time I start the computer I get:

Log Name:      Microsoft-Windows-PrintService/Admin
Source:        Microsoft-Windows-PrintService
Date:          10/7/2012 8:42:15 AM
Event ID:      315
Task Category: Sharing a printer
Level:         Error
Keywords:      Classic Spooler Event,Printer
User:          SYSTEM
Computer:      PC-1
Description:
The print spooler failed to share printer HP Officejet 6500 E710n-z (Network) with shared resource name HP Officejet 6500 E710n-z (Network). Error 2114. The printer cannot be used by others on the network.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-PrintService" Guid="{747EF6FD-E535-4D16-B510-42C90F6873A1}" />
    <EventID>315</EventID>
    <Version>0</Version>
    <Level>2</Level>
    <Task>30</Task>
    <Opcode>12</Opcode>
    <Keywords>0x8000000000000820</Keywords>
    <TimeCreated SystemTime="2012-10-07T13:42:15.674031900Z" />
    <EventRecordID>104</EventRecordID>
    <Correlation />
    <Execution ProcessID="1272" ThreadID="1780" />
    <Channel>Microsoft-Windows-PrintService/Admin</Channel>
    <Computer>PC-1</Computer>
    <Security UserID="S-1-5-18" />
  </System>
  <UserData>
    <ShareFailed xmlns:auto-ns3="http://schemas.microsoft.com/win/2004/08/events" xmlns="http://manifests.microsoft.com/win/2005/08/windows/printing/spooler/core/events">
      <Param1>2114</Param1>
      <Param2>HP Officejet 6500 E710n-z (Network)</Param2>
      <Param3>HP Officejet 6500 E710n-z (Network)</Param3>
    </ShareFailed>
  </UserData>
</Event>

All help welcome.  Thanks in advance.

[mpw101 · Accepted solution]

I found that Event ID 315 with error 2114 is a timing problem.  When I turn on the printer before the computer I get this error in the Event Log.  If I start the computer first and then turn on the printer, this error disappears.