Avast stopped and found App Crash info listed below. Three seperate events.
9/9/2010 3:37 PM Application Error Faulting application name: AvastSvc.exe, version: 5.0.677.0, time stamp: 0x4c8651fd
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x00010000
Faulting process id: 0x480
Faulting application start time: 0x01cb50160dc7cf3d
Faulting application path: C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
Faulting module path: unknown
Report Id: 1c51467e-bc28-11df-93dd-0026189e970b
9/9/2010 3:37 PM Windows Error Reporting Fault bucket , type 0
Event Name: BEX
Response: Not available
Cab Id: 0

Problem signature:
P1: AvastSvc.exe
P2: 5.0.677.0
P3: 4c8651fd
P4: StackHash_0a9e
P5: 0.0.0.0
P6: 00000000
P7: 00010000
P8: c0000005
P9: 00000008
P10: 

Attached files:
C:\Windows\Temp\WER2C12.tmp.appcompat.txt
C:\Windows\Temp\WER2C81.tmp.WERInternalMetadata.xml
C:\Windows\Temp\WER2C82.tmp.hdmp
C:\Windows\Temp\WER2D3E.tmp.mdmp

These files may be available here:
C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_AvastSvc.exe_3d65eda4da51e8a65af52bf94d4046963f1aaba3_cab_13e62da8

Analysis symbol: 
Rechecking for solution: 0
Report Id: 1c51467e-bc28-11df-93dd-0026189e970b
Report Status: 0
9/9/2010 3:37 PM Windows Error Reporting Fault bucket , type 0
Event Name: BEX
Response: Not available
Cab Id: 0

Problem signature:
P1: AvastSvc.exe
P2: 5.0.677.0
P3: 4c8651fd
P4: StackHash_0a9e
P5: 0.0.0.0
P6: 00000000
P7: 00010000
P8: c0000005
P9: 00000008
P10: 

Attached files:
C:\Windows\Temp\WER2C12.tmp.appcompat.txt
C:\Windows\Temp\WER2C81.tmp.WERInternalMetadata.xml
C:\Windows\Temp\WER2C82.tmp.hdmp
C:\Windows\Temp\WER2D3E.tmp.mdmp

These files may be available here:
C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_AvastSvc.exe_3d65eda4da51e8a65af52bf94d4046963f1aaba3_cab_13e62da8

Analysis symbol: 
Rechecking for solution: 0
Report Id: 1c51467e-bc28-11df-93dd-0026189e970b
Report Status: 4