Web page tips this site is unsafe solution

The web page suggests that this site is unsafe solution

If the computer can access the Internet normally ,qq, Wechat can be used normally , Some web pages can't be opened , Prompt that this site is not secure , And I can't load the web page , It's probably local DNS Cache errors , My is unable to enter Baidu , Every time you have entered, you will be prompted that this site is not safe , But other web pages can be browsed normally , Solution ：

Press and hold on the keyboard Windows Bond addition R, Enter... In the dialog box that comes out cmd, And then go back , Enter... In the small black window ipconfig/flushdns

Then prompt as follows ：

Then enter the website , I really can't restart the computer .