I'm looking for a list of AV products, (free or paid) that can be run as an on-demand context menu scanner only with no running programs and preferably no drivers either. Avira can work in that way. Avast 4 did but Avast 5 needs to have the main UI running in the taskbar. I have an old Kaspersky 4.5 that does too (the last version to do so) but it can take a long time to start the scan. Does anyone know of others that fit the bill?