Thanks for your responses.
This glitch has come up right after I had this laptop needing a re-install of Win 10 (I should have mentioned that!) so a number of apps deleted.
I don't have that Goofbid nor ever had on this laptop. Unless the re-installer helper put it on but it is not listed in All app.
The malware tip I have seen and went thru the Chrome Cleanup tool which found nothing. This is twice I have switched it on since the re-install. No sign of hacking on 3 other computers in the house.
Cannot delete the optional search engines as in the list there is no option to delete - clicking on one just highlights it, nothing else except for the Done button. I see on the extended list of 'Other search engines' the list just contains website urls.
Initially I could put in Google as the default engine but then a search in the address bar got me to the Goofbid page. Going back to settings the default engine was changed to Goofbid. The down arrow next to Manage Search engines in Settings does not work now.
Edited by zzzz, 11 November 2016 - 11:35 AM.