I suspect that you installed some third-party "driver pack" -- which is always a very bad idea -- and as a result, you installed the "SEARCHERBAR" browser hijacker malware. If you used "DriverPack Notifier" -- which is known to install SEARCHER BAR -- you should uninstall it.
It seems, however, that whatever you have for an antivirus/antimalware solution has at least partially disabled SEARCHERBAR.
Although there are various websites with directions for removing SEARCHERBAR, many of these sites are themselves a bit sketchy. I suggest starting by downloading Malwarebytes (https://www.malwarebytes.com/) and running a complete system scan. The Malwarebytes download is a 14-day free trial. If you don't want to pay for it, you can either uninstall it or let it be and it will revert to an on-demand-only scanner rather than a real-time protection tool.