Although you should use caution following remedies intended for someone else, in this particular case the same exact instructions apply to your concern.
In anticipation of others piling on with additional "me too" requests consider the following general instructions for eradicating adware. These things are always the result of deliberately downloading and installing something. You never need to download and install something else to fix it.
To learn how not to make that mistake again, please read How to install adware.
The subject dialog always takes this form, as described in Safely open apps on your Mac:
Move to Trash is the correct response. When that message becomes persistent though, the cause is always the same: one or more files that spawn the process resulting in its appearance.
General instructions applicable to all similarly categorized malware are as follows:
The folders to be examined are these three:
~/Library/LaunchAgents
/Library/LaunchDaemons
/Library/LaunchAgents
There should only be few files, if any, in each of the above folders. You should have a passing familiarity with what they are and the reason you need them. If you're unsure, ask.
Legitimate products that deposit system-altering components in those folders commonly include Adobe, Amazon, Citrix, Dropbox, Google and Microsoft, including its product Skype. Teamviewer also, assuming you really need it. Less common but equally legitimate products include Steam (games), various non-Apple "cloud backup" products that don't work very well, and device drivers for external hardware such as printers and non-Apple input devices. It's incumbent upon every Mac user to know the products they install on your Mac, so the files they deposit in those folders will never come as a surprise.
Illegitimate products notorious for causing trouble include any non-Apple product that claims to "clean", "enhance", "optimize", "protect", or "scan" your Mac. Anything in that broad category of junk should be uninstalled according to their instructions and never reinstalled, ever again.
Everything else should be regarded as suspicious. Some malware will litter those folders with hundreds of randomly named files in a pathetic attempt to obscure itself. For one particularly egregious example refer to notice unysgar.app, but if you have no explanation for any particular file in those folders you need to investigate.
Among a few examples are files containing the following in their names:
calculator
confcloud
copypaste
date
fixer
helper
hlpr
mafntask
moniter 🙄
pcv
scan
search
systemExtr
spigot
techyutil
time
updService
util
utilty
vlm
... files containing nothing but a random string of long alphanumeric text
... among a few others, but deleting those is a good place to start.
Then, reset your desired Search Engine, uninstall any strange Extensions, remove any unwanted Login Items, delete any unwanted apps, examine System Preferences for the existence of any Profiles, and finally restart your Mac (normally; not Safe Mode).
Then, evaluate its operation. If something still isn't right re-examine those three folders and determine if you overlooked anything. If something really gets messed up you have Time Machine to fall back on, so keep that important fact in mind.
That in a nutshell is how you get rid of adware, on your own, without having to install some sketchy tool or even ask anyone else for help. If you prefer individual attention specifically tailored to your needs though, then by all means please post a new Discussion. To do that click the Post link above right, and choose Discussion from the dropdown menu:
