Last week, ChinaTechNews covered the lawsuit raised by a Mr. Shi against Internet company 3721, owned by Yahoo, for an alleged infringement of his rights after he found that 3721 had interfered with his computer, deleting the existing rival Baidu software on his terminal, and also found that searches for information from other websites were being illegally monitored and shielded.

It is now being reported that visitors to the 3721 site will automatically download a .dll file to their MS Explorer, directing the user back to 3721 automatically whenever a search is performed.

Norton has since classified this file as a virus, even though it is not self-replicating–the announcement can be found here.

Industry analysts are monitoring the effects this will have both on Yahoo and it's Chinese colleague–with what amounts to a US backdoor beginning to be installed on Chinese computers.