Hi,
Tech, I have read many of your posts, but I can only recall one instance when you were actually humble.
I googled ad-push to no avail. I assume you mean Emsi have been known to advertise their products (as I read Avast have), but you always do that in your signature and you have even been known to implore individual members to use that product.
You were most wise to be able to restore, but devil-may-care and otherwise foolish to delete or even quarantine without investigation. Investigation must be the watchword with any such program (even Avast) and a-squared did not automatically delete or quarantine anything - you did that.
DavidR, if I have understood properly you run Avast on-demand scans weekly, but with its on access protection that seems unnecessary (apart from any context menu type scan on one or two special purpose folders). If I were to do a wide range weekly scan I would use a-squared Free (unintrusively).
Avast Home is free and prevention is obviously better than detection or cure. With Emsi the detection rate is probably unbettered, but you would have to pay for that same level of prevention.
I suggest those of you with broadband may wish to clear your harmless cookies with CCleaner, or whatever, download
http://download1.emsisoft.com/a2usb.zip, then unzip it (to your hard drive or USB stick - it will make no registry entries and all files can be deleted as and when desired). Then run a2free.exe as extensively as you please. There is no need delete or quarantine anything; you can just check. Then save the short report and perhaps post it here or in the Emsi Forum (with or without prior investigation of any flag except possibly to see if there is any identical item whitelisted or detected using Avast).
My regards