Very recently my Avast has quarantined my Auslogics defrag as malware, even states it has a virus and gives the virus a name. Took the program clean off my desktop without warning when I started to use it.
I tried to download Auslogics defrag again, but immediately the download started, Avast stopped it.
What is going on ?
You can report a suspected FP here: https://www.avast.com/false-positive-file-form.php
Most likely a PUP (Potentially Unwanted Program), because of additional programs (and/or toolbars) that Auslogics has been “pushing” in recent years.
If that’s confirmed as the reason, you can add it to your list of exclusions if you wish to keep it.
all malwarebytes tools (Malwarebytes , adwcleaner , jrt) already see (a lot of) auslogics tools as malicious.
I don’t know fella’s - I downloaded Auslogics Defrag free without a hitch today. It all installed perfectly with no yelp from Avast.
Its one of those computer hiccups we all get. I am sorry to trouble you, but yesterday Avast blocked it and today Avast liked it. Well, you can’y win 'em all can you ?
All I can do is thank you for responding and leave with - Zip-a-dee-doo-dah, zip-a-dee-ay
My, oh, my, what a wonderful day.
You’re welcome.
False positive one day cleared up via VPS update so now it’s OK again. That sometimes happens. Stay safe. 
To keep unwanted add-ons out while installing the program, install Unchecky