there was an error while completing the setup process

“there was an error while completing the setup process”!!!

After several failed attempts to get into safe mode I was able to use the uninstall utility
http://www.avast.com/uninstall-utility

but the same error is showing!

i attached setup log and an image with the error

extras from log: "Extract: tried to extract ‘C:\ProgramData\AVAST Software\Avast\sounds\fw_question.wav’ from pkg ‘ais_core’ but failed miserably. Error code 0x00000005setup failed "

please help

PS:
win 7 extreme edition sp 1
no other security software installed
i used avast before avast!