Where are the scan logs for boot time scan ? While scanning it said
\all users\windows\application data\avast software\avast\report\aswboot.txt
There is no such directory tree !
There appears to be something missing at the start of the location you gave.
You don’t say what your Operating System is as it has different locations depending on OS.
Look in:
C:\Documents and Settings\All Users\Application Data\Avast Software\Avast\report\aswBoot.txt file (XP location)
C:\ProgramData\Avast Software\Avast\report\aswBoot.txt (Vista, Win7 location),
The folder location in win7 (and later) may be hidden by windows folder options.