Crash to Desktop

Hello,

I have been having issues with FSX Gold Edition (w/Acceleration Pack) for a while now.  Problem typically arises after I have been flying for about 20 or 30 minutes.  I will get a quick buzzing sound on the speaker and the screen will go blank.  About a second later the screen will come back up and display my pc wallpaper.  When I log back in it appears that FSX has continued to run in the background, or a least picked up exactly where it left off.  Very frustrating. I have gone through the CTD Guide, reinstalled FSX with addons (REX Direct Textures w/ Soft Clouds and ORBX Global), checked for the correct version of  UIAutomationcore.dll, checked  cpu and gpu temperatures, run a gpu stress test, installed a new psu, reduced FSX and REX settings,  etc.... and the problem persists.  Sometimes it appears that no errors are generated at the time that the issue occurred.  Today I received the error message listed below at around the same time the problem occurred.  I'm  not even sure if it is related but perhaps a more knowledgeable person can make some sense of it.  My system is an older Dell desktop pc with an i7 -3370 3.4 Ghz processor, 8 GB RAM, ATI RAdeon 7800 series GPU with 2 - 21 inch HD monitors, running Windows 8.1.

Log Name:      Application
Source:        Microsoft-Windows-EventSystem
Date:          8/30/2020 3:07:10 PM
Event ID:      4622
Task Category: Event Service
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      WINDOWS-3PDRTPD
Description:
The COM+ Event System could not marshal the subscriber for subscription {488D3644-B1B7-4E57-B18B-505CE9B953C6}-{00000000-0000-0000-0000-000000000000}-{00000000-0000-0000-0000-000000000000}.  The HRESULT was 800401fb.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-EventSystem" Guid="{899daace-4868-4295-afcd-9eb8fb497561}" EventSourceName="EventSystem" />
    <EventID Qualifiers="49152">4622</EventID>
    <Version>0</Version>
    <Level>2</Level>
    <Task>17</Task>
    <Opcode>0</Opcode>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2020-08-30T19:07:10.000000000Z" />
    <EventRecordID>849225</EventRecordID>
    <Correlation />
    <Execution ProcessID="0" ThreadID="0" />
    <Channel>Application</Channel>
    <Computer>WINDOWS-3PDRTPD</Computer>
    <Security />
  </System>
  <EventData>
    <Data Name="param1">800401fb</Data>
    <Data Name="param2">{488D3644-B1B7-4E57-B18B-505CE9B953C6}-{00000000-0000-0000-0000-000000000000}-{00000000-0000-0000-0000-000000000000}</Data>
  </EventData>
</Event>