How to reject Sogou browser and change IE default search

We are using IE browser, set the default search is Baidu, but recently search for something, unexpectedly automatically changed to use Sogou to search, which makes me puzzled, I have not set up the default search tool for IE, ah, why is this so?

After some research, found that this is Sogou Pinyin in mischief, usually play the news window I also put up with it, did not expect to automatically change the default search engine. Sogou Input added an address bar search function, which is turned on by default. As long as you use Sogou pinyin to type, you will automatically jump to Sogou search to find it. You only need to uncheck and open the address bar search function in the advanced settings of Sogou's pinyin input method.

● uncheck this item

If you want to prevent other software from changing IE's default search engine, you can check for blockers to suggest changing the default search provider in the search provider Settings of manage add-ins.

● forbids changing the default search engine