It's a separate topic how to look for activities with "sliide" in the name. (Which we can cover separately, if people feel that's a useful topic.)
Since I'm always kind hearted and purposefully helpful, I just now wrote a simple but detailed tutorial so any Android user with a PC can identify and kill any rogue popup on Android, which is how I found & killed this one.
*Tutorial: How to use a PC to find (& kill!) a rogue Android activity & its offending package*
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https://www.novabbs.com/computers/article-flat.php?id=59610&group=comp.mobile.android#59610>
I wrote it for Linux, Windows command line & Windows powershell.
If you're on Linux, it would be great for you to test the commands.
As always, we work for the good of everyone on both sides of the Pond.
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This one tutorial contains more value than some people have posted in their entire lives.
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