DavidR
2
There is no problem in adding another on-demand only AV as a secondary/back-up check. The only problem exists if you install another resident on-access AV.
My only consideration is when you are going to do an on-demand scan with another security application that you ‘pause’ the standard shield. There are some how say it isn’t required, but doing so has no adverse effect.
The problem arises if say BD unpacks an archive file avast will try to scan the files that are being unpacked and if it detects a file that is infected avast will alert and try to lock that file, now BD also wants to scan that file, etc. To my mind that is potential for conflict which can be avoided by pausing avast’s standard shield, this also avoids double scanning and should speed the time taken for the scan.