I see that this is referred to as a Virus. I have several Baidu free accounts and use the Baidu downloader. I think Baidu works very well, and the range of stuff available is huge. I use Windows Defender and MalwareBytes AntiMalware. I have never knowingly had any problems from using Baidu - indeed the hardest bit is pressing the right buttons as I do not understand Chinese. Cannot use Google Chrome now, as it blocks this method of download, rather than Baidu itself. Have to use Firefox, which is nowhere near as good as Chrome on the translation side. The only times I have been caught recently are on emails from friends, or supposed friends. Not actually installed anything nasty, but enough to cause alarm. I personally think email is a much bigger threat than Baidu, or other Chinese sites. Aliexpress works very well as well as Ebay China. Post and Packing free to the UK for an item costing less than two pounds is remarkable, and never failed to get the goods. The standard of programming on Aliexpress is equal to Amazon or Ebay. I would be very grateful to know what the specific threats are.