I'll try to explain the best way possible... So, I've been playing with a hosts file... lots and lots of entries... and optimized for performance. Normally, a hosts file has entries like: 127.0.0.1 domain 127.0.0.1 domain2 etc But, it's also possible to have it like, and this is just a personal taste: 0.0.0.0 domain1 domain 2 (up to 9 entries) etc OK... The situation with Prevx is the following: I got an alert for Prevx saying: This entry -prevx.com (It has no -. It was placed by me to prevent clicking) was added by me in the hosts file. But, AFAIK, -prevx.com is not www.prevx.com Prevx also seems to agree, because when I enter -prevx.com I get an alert from Prevx preventing access to that page. Two things: * Prevx complains about this entry -prevx.com, and then states it is dangerous to enter it * Prevx should be able to work with hosts file in the format mentioned.