Just re-install MSE, and it should automagically disable Defender. Since it's part of windows, I don't think you can completely uninstall it.
I was wondering about uninstalling the defender. I won't try to now.
But, what about the process errors as it tries to startup?
Log Name: System
Source: Microsoft Antimalware
Date: 5/20/2011 11:49:36 PM
Event ID: 3002
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: PC
Description:
Microsoft Antimalware Real-Time Protection feature has encountered an error and failed.
Feature: Behavior Monitoring
Error Code: 0x80004005
Error description: Unspecified error
Reason: The filter driver requires an up-to-date engine in order to function. You must install the latest definition updates in order to enable real-time protection.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft Antimalware" />
<EventID Qualifiers="0">3002</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2011-05-21T04:49:36.000000000Z" />
<EventRecordID>91627</EventRecordID>
<Channel>System</Channel>
<Computer>DLL-PC</Computer>
<Security />
</System>
<EventData>
<Data>%%860</Data>
<Data>3.0.8107.0</Data>
<Data>%%835</Data>
<Data>%%842</Data>
<Data>0x80004005</Data>
<Data>Unspecified error </Data>
<Data>5</Data>
</EventData>
</Event>
Log Name: System
Source: Microsoft Antimalware
Date: 5/20/2011 11:55:23 PM
Event ID: 5008
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: PC
Description:
Microsoft Antimalware engine has been terminated due to an unexpected error.
Failure Type: Crash
Exception code: 0xc000001d
Resource: file:C:\Program Files (x86)\Qtracker\Graphics\Game Icons\MedalofHonorAlliedAssault.ico
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft Antimalware" />
<EventID Qualifiers="0">5008</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2011-05-21T04:55:23.000000000Z" />
<EventRecordID>91651</EventRecordID>
<Channel>System</Channel>
<Computer>DLL-PC</Computer>
<Security />
</System>
<EventData>
<Data>%%860</Data>
<Data>3.0.8107.0</Data>
<Data>file:C:\Program Files (x86)\Qtracker\Graphics\Game Icons\MedalofHonorAlliedAssault.ico</Data>
<Data>2</Data>
<Data>%%830</Data>
<Data>0xc000001d</Data>
</EventData>
</Event>
Log Name: System
Source: Service Control Manager
Date: 5/20/2011 11:55:27 PM
Event ID: 7031
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: PC
Description:
The Microsoft Antimalware Service service terminated unexpectedly. It has done this 1 time(s). The following corrective action will be taken in 15000 milliseconds: Restart the service.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Service Control Manager" Guid="{555908d1-a6d7-4695-8e1e-26931d2012f4}" EventSourceName="Service Control Manager" />
<EventID Qualifiers="49152">7031</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x8080000000000000</Keywords>
<TimeCreated SystemTime="2011-05-21T04:55:27.412636100Z" />
<EventRecordID>91654</EventRecordID>
<Correlation />
<Execution ProcessID="588" ThreadID="3176" />
<Channel>System</Channel>
<Computer>DLL-PC</Computer>
<Security />
</System>
<EventData>
<Data Name="param1">Microsoft Antimalware Service</Data>
<Data Name="param2">1</Data>
<Data Name="param3">15000</Data>
<Data Name="param4">1</Data>
<Data Name="param5">Restart the service</Data>
</EventData>
</Event>
I will ignore the updates for the Defender as they appear.
And, I will turn OFF the Defender to see if these messages go away.