No, avast does not install the SafeZone Browser silently anymore.
They even stopped the automatic roll-out of it to the users of their free av.
There was/is no recent update unless you are using a beta version. (latest release was on 03 Jun 2016)
The latest update for a final version was on 27 Apr 2016.
Windows doesn't have a uninstaller.
If you select "remove" through the control panel it calls the uninstaller provided by the creator of the software.
You can easily test/check this yourself.
- Download this little tool I created >
https://forum.avast.com/index.php?topic=167982.msg1313118#msg1313118- Install it
- Navigate to the installation folder
- Remove the file called uninst.exe
- Open the control panel
- Navigate to the listing of the tool
- Select remove
You will get a error.
We are not complaining about a application of IObit.
We just showed you that they can't be trusted.
avast is not (as you call it) planting spyware.
I wonder if you even know what spyware is...