how to remove "in archive

Hi
Please can anyone help, I set up my own web site for the first time yesterday using youtube and muddling my way through and was happy with the result

Today I tried to add a you tube link onto the site so I downloaded the plugin and inserted it in the widget area just below where the search box widget was.

When the YouTube link came up it said invalid YouTube user name, so I thought I would delete it and start again

the problem is the YouTube box has gone which is ok, but where the search box was on my website was it now just says “in archive”

the same “in archive” box is in the top right hand corner of all of my pages apart from the front page

can anyone help get rid of the in archive even if the search box doesn’t come back it just looks awful