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Help Tab on Menu Bar

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These have happened within the last few weeks. 1. When I do a search, Google automatically switches to Yahoo Search, How do I stop yahoo search? 2. In Options, When I click on extensions, add on, the page flashes for a second then reverts to a blank new tab?? 3. The 'help tab' on the 'menu bar', when i try to open 'Troubleshooting Information", the page flashes then reverts to a blank new tab??

I tried starting in slow mode, but that didn't change anything. Is there something I can do to restore these problems, I'm 67 and not that savvy with computer language, so please simplify any solutions you may recommend.

Thank you, JP

PS: I don't understand what I am suppose to do in the following section below ? Add images?? Troubleshoot Information; Share Data????

These have happened within the last few weeks. 1. When I do a search, Google automatically switches to Yahoo Search, How do I stop yahoo search? 2. In Options, When I click on extensions, add on, the page flashes for a second then reverts to a blank new tab?? 3. The 'help tab' on the 'menu bar', when i try to open 'Troubleshooting Information", the page flashes then reverts to a blank new tab?? I tried starting in slow mode, but that didn't change anything. Is there something I can do to restore these problems, I'm 67 and not that savvy with computer language, so please simplify any solutions you may recommend. Thank you, JP PS: I don't understand what I am suppose to do in the following section below ? Add images?? Troubleshoot Information; Share Data????

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Type about:addons<enter> in the address bar to open your Add-ons Manager. Hot key; (<Control> [Mac=<Command>] <Shift> A)

In the Add-ons Manager, on the left, select Extensions. Remove “ Yahoo “ Anything.

Also remove SafeSearch, SearchAssist Incognito, FileConverter Addon, SearchLock, DiscreteSearch, WebSearch, Findwide Search Engine, securedsearch

Now do the same in the computer’s Programs Folder.

Windows: Start > Control Panel > Uninstall Programs. Mac: Open the Applications folder. Linux: Check your user manual.

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Can you list your extensions as shown on the about:support page ?

You can do a malware scan just to be sure.