virtualbox.org

The same error on Intel i7-6700K with ASRock Z270M Pro4 (default settings) with AMI DuoS Android ARM emulator based on VirtualBox.

- <Event xmlns=".schemas.">
— <System>
<Provider Name="Microsoft-Windows-WHEA-Logger" Guid="{C26C4F3C-3F66-4E99-8F8A-39405CFED220}" /> 
<EventID>19</EventID> 
<Version>0</Version> 
<Level>3</Level> 
<Task>0</Task> 
<Opcode>0</Opcode> 
<Keywords>0x8000000000000000</Keywords> 
<TimeCreated SystemTime="2017-04-04T17:02:29.170160600Z" /> 
<EventRecordID>107186</EventRecordID> 
<Correlation ActivityID="{62786412-520A-49CD-9DB3-2B6725E06C4B}" /> 
<Execution ProcessID="1440" ThreadID="14060" /> 
<Channel>System</Channel> 
</System>
— <EventData>
<Data Name="ErrorSource">1</Data> 
<Data Name="ApicId">1</Data> 
<Data Name="MCABank">0</Data> 
<Data Name="MciStat">0x9000004000010005</Data> 
<Data Name="MciAddr">0x0</Data> 
<Data Name="MciMisc">0x0</Data> 
<Data Name="ErrorType">12</Data> 
<Data Name="TransactionType">256</Data> 
<Data Name="Participation">256</Data> 
<Data Name="RequestType">256</Data> 
<Data Name="MemorIO">256</Data> 
<Data Name="MemHierarchyLvl">256</Data> 
<Data Name="Timeout">256</Data> 
<Data Name="OperationType">256</Data> 
<Data Name="Channel">256</Data> 
<Data Name="Length">864</Data> 
</EventData>
</Event>

Are you sure it's the same error?
First of all, you're on a Windows host. Second, there seems to be a flood of search results for "event 19 windows". Third there are a ton of results on "event 19 windows i7-6700k" and none (of the first page results) has anything to do with VirtualBox. It seems to be more of a generic error that gets triggered from various sources.