After I run a scan, I get a list of 130 items it was unable to scan. Is this normal? I’ve used other products in the past, but this is a new one on me.
Hello ;D
Yes, this is normal 
Usually these files are password protected archives - no AV can scan password protected archives 
Also you can do a forum search, because this question has been discussed many times here
Thanks, I spent an hour browsing before I posted. ???
I just found the search function. :o
Your are welcome ;D
Here’s one similar topic :> http://forum.avast.com/index.php?topic=15195.0
Many programs (usually security based ones) password protect their files for legitimate reasons such as AdAware and Spybot Search & Destroy, there are others (and avast doesn’t know the password or have any way of using it even if it did know it).
When you run scans with the above programs and you delete harmful entries that they detect, a copy is kept (in quarantine/restore/backup) in case you need to reverse what you did. These are usually password protected, you should do some housekeeping and delete old backup/recovery/quarantine entries (older than two weeks or so), this will reduce the numbers of files that can’t be scanned.
By examining 1) the reason given by avast! for not being able to scan the files, 2) the location of the files, you can get an idea of what program they relate to. You may need to expand the column headings to see all the text.
Files that can’t be scanned are just that, not an indication they are suspicious/infected, just unable to be scanned.