Hi,
I have reported similar problem before (see: http://forum.avast.com/index.php?topic=124911.0)
But this time, it is in my mother’s computer. I’ve done the scans but this time aswMBR.exe crashed 1 minute after I click “scan”:
問題簽章:
問題事件名稱: APPCRASH
應用程式名稱: aswMBR.exe
應用程式版本: 0.9.9.1771
應用程式時間戳記: 5147644e
錯誤模組名稱: ntdll.dll
錯誤模組版本: 6.2.9200.16384
錯誤模組時間戳記: 5010ae7a
例外狀況代碼: c0000005
例外狀況位移: 0004f44d
essexboy is notified, check back later today. he is usually here after work hours european time
try running aswMBR from safe mode
Hi again,
I boot in to safe mode, but it launch and freeze with the following line
14:32:19.821 Initialize error c0000061 - driver not load
than it say
14:32:34.267 Avast engine defs: 13062005
when I click “scan”, it say “scan error:”
AswMBR is not yet compatible with windows 8
Please download to your desktop Short cut cleaner
Then run.
https://dl.dropbox.com/u/73555776/sc%20cleaner.JPG
When the Shortcut Cleaner has finished scanning your hard drive it will create a log file on your desktop called sc-cleaner.txt and then display it.
Please post that log
THEN
Please download Junkware Removal Tool to your desktop.
[]Right-mouse click JRT.exe and select “Run as Administrator” the tool will open and start scanning your system
[]please be patient as this can take a while to complete depending on your system’s specifications
[]On completion, a log (JRT.txt) is saved to your desktop and will automatically open.
[]post the contents of JRT.txt into your next message.
Here are the logs, the problem seem to be fixed 
Once you are happy let me know