Search Engine Changed To Yahoo

Yesterday my search engine changed from Google to Yahoo. I didn't change it and don't like it.

I checked my setting and they all say Google.
I reset to original setting.
I ran 4 antivirus programs. (The first one found 39 things for "PC App Store", which I quarantined. The next 3 were clean)
I looked at installed programs and found "PC App Store" and uninstalled it.
I used the Chrome malware scanner
I disabled chrome extensions.
I did it all again.

Nothing worked. Any ideas?

 

No Baidu folder. When I searched for it I found 4 PC-App-Store files that hadn't deleted with the uninstall. Deleting them didn't help.
I used Windows Defender, Super Antispyware, Malwarebytes, and Total AV. Malwarebytes found 39 files and deleted 37 of them. SASW found 179 tracking cookies, and the other two found nothing.

I have been using Yahoo search, forgetting it was there, and it isn't very good.

 

Could it be your search engine default was changed by a third party software install you instigated, where you missed the checkbox perhaps?

Is your system displaying any other weird behavior?

 

No, when I did a search on *PC*Store*.* I found and deleted 4 files. One was an icon and another a JPG. I don't know what the other two were; I should have written them down. There were larger and I didn't recognize them.