PLZ check the shots…
http://postimg.org/image/bhu23kqc5/ is this a problem… and also when ever i try to scan a file its like http://postimg.org/image/t9p42bodj/ and never ends… is there any solution… 
and for each single file scan one ??? increases!
i tired restore, repair, registry clean up… opening new accounts… im kind of lost…
have you tried latest release candidate https://forum.avast.com/index.php?topic=150784.0
I have similar problem when update from version 8 and/or import version 8 settings to version 2014. This is a kind of remnant. I think you can safely delete these scan.
EDIT: spelling
i tried the beta version it showing installer cannot open the sfx archive (code 0x3ee)
You should quote Pondus instead. If you really want to try beta version, you may try uninstall current versions first. The error you say may be caused by corrupted installer, too, so redownload may help.
I keep my opinion that they can be delete without causing any problems
i downloaded 2 time got same error… im not sure should i uninstall… i worry abt registry corruption… u know it always happens if u uninstall a security s/w if may end up reinstall ur OS… in fact i learn how to format my system after uninstalling McAfee(4-5 yrs b4…) so if i got any problem with security s/w i just do format…even so i got no time and not in mood now… and the delete didnt remove any thing from my current installed avast…
Try reset avast!'s settings. Check the Program settings only (the one that will also reset scan settings). As I have said, this problems happen becasue scan settings of old version is not compatible with the new ones Reset to default settings would solve this.
But after that, you need to reconfigure your setting MANUALLY, do NOT use any backup, it will probably bring back problems.
In your case, this way would be most simple, I think.