On the first scan (boot scan) after installation of avast it would not be possible to do a repair.
You need to have run the run the 'Generate VRDB now', this VRDB it what avast uses as a reference point to attempt a repair. So until this has been done repair is not really an option, so that leaves you with delete or move to chest.
Delete when you are not sure is not a very good choice, so moving it to the avast chest at least gives you the chance to restore the file to its location or delete it later when you are sure it is ok to do so.
The avast chest is a protected area where you can put files without fear that they can be activated, etc.
The avast32 is a totally different product so the documentation would not be relevant. The avast help file can be found in the C:\Program Files\Alwil Software\Avast4\ENGLISH\HELP help.chm (assumes you are using english version)
It can also be accessed through Start>All Programs>avast>Help or right click the avast icon and select 'start avast antivirus' when that opens, clcik on the menu and select help or F1 key.
A visit to this link would give you some useful information -
User's FAQWelcome to the forums.
HTH David