Microsoft Flight Simulator X :FSX.EXE Aplication Error

The instruction at 0x20e969a5 referenced memory at 0x00000000.

The memory could not be read.

Click ok to terminate the program.

 

I also can't get sound out of my speakers. Don't know if that's related.

Version=1
EventType=AppHelpSoftBlockOSSpecific
EventTime=130270464606008736
ReportType=1
Consent=2
UploadTime=130270464606164963
ReportIdentifier=5d3b1f20-3c3f-11e3-befc-10604b5cf9b8
Response.BucketId=de52d088b683337e837bd3dd5b5656ab
Response.BucketTable=5
Response.LegacyBucketId=-482614609
Response.type=4
Sig[0].Name=Problem Signature 01
Sig[0].Value={11111111-1111-1111-1111-111111111111}
Sig[1].Name=Problem Signature 02
Sig[1].Value={a62f4a2a-7033-4008-ada2-46933e6950e5}
Sig[2].Name=Problem Signature 03
Sig[2].Value=windows blue
DynamicSig[1].Name=OS Version
DynamicSig[1].Value=6.3.9600.2.0.0.768.101
DynamicSig[2].Name=Locale ID
DynamicSig[2].Value=1033
UI[2]=C:\Program Files (x86)\AVG\AVG PC TuneUp\Integrator.exe
UI[3]=AVG PC Tuneup has known compatibility issues
UI[4]=Windows can check online for a solution to the problem.
UI[5]=Check online for a solution
UI[6]=Check online for a solution later and close the program
UI[7]=Close this window
UI[8]=AVG PC Tuneup has known compatibility issues
State[0].Key=Transport.DoneStage1
State[0].Value=1
FriendlyEventName=AVG PC Tuneup has known compatibility issues
ConsentKey=AppHelpSoftBlockOSSpecific
AppName=AVG PC Tuneup
AppPath=C:\Program Files (x86)\AVG\AVG PC TuneUp\Integrator.exe
ReportDescription=AVG PC Tuneup is incompatible with this version of Windows. For more information, contact AVG.
ApplicationIdentity=00000000000000000000000000000000

To paste in the window , it said to use the three  keys , which is the command button ?

Alright given AVG PC coming up repeatedly, I'm assuming that's your Anti virus provider. If you can disable that or at a minimum exclude fsx from it's search range then try opening fsx again.

Disabled both AVG and Windows Firewall. Hope this problem isn't  a result of me downloading Windows 8.1. FSX was working right after I downloaded.

No sound, No You Tube Video and FSX won't start. What caused this ? I have a few ideas. I used Revo un-install, maybe I un-installed too much. I recently downloaded Windows 8.1, maybe that's a problem. I was messing with the turn off/on of Windows programs in the Control Panel. I went back and turned them all on. I hope I won't need a system recovery.