Iv not yet had the previous issue of unexpected shutdown but when checking the reliability monitor i noticed another problem with the avast updating
Problem signature
Problem Event Name: APPCRASH
Application Name: avast.setup
Application Version: 5.0.0.0
Application Timestamp: 4ebea2fc
Fault Module Name: avast.setup
Fault Module Version: 5.0.0.0
Fault Module Timestamp: 4ebea2fc
Exception Code: c0000005
Exception Offset: 0008bac5
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 3081
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789
Extra information about the problem
Bucket ID: 2697872582
And the avast setup
Description
Faulting application name: avast.setup, version: 5.0.0.0, time stamp: 0x4ebea2fc
Faulting module name: avast.setup, version: 5.0.0.0, time stamp: 0x4ebea2fc
Exception code: 0xc0000005
Fault offset: 0x0008bac5
Faulting process id: 0x7d8
Faulting application start time: 0x01cca46262cd4c07
Faulting application path: C:\Program Files\AVAST Software\Avast\setup\avast.setup
Faulting module path: C:\Program Files\AVAST Software\Avast\setup\avast.setup
Report Id: a31b282c-1055-11e1-8a5d-00a0d5ffffae
Sent a crash dump to your email Vlk
I think all this happened with the latest auto update, iv tried several restarts and cold boots and no further problems yet.
Fingers crossed

it finally showed up, windows was not properly shut down
