Thank you very much Pondus.

I did apply the Malaware bytes and had to stop there.

After executing Malaware bytes I went to xinhuanet.com and tested … opening a page from xinhua appeared another pop up -attached it here-, and tried other pages and there were no more pop ups

Then I closed and reopen xinhuanet and did the same … then closed the browser reopened it and entered xinhuanet.com, tried a page from it and no more pop ups in neither cases

I then tried to download FRST at bleepercomputer -as instructed- … but there emerged another pop up detecting “harmful web page file” … that I attached here also