I know nothing of K9...A link I came across:http://download.k9webprotection.com/k9-webprotection.exeThat looks to be version 4.5.1001.0.That is also what Softpedia shows (though their download link links back to Symantec, which is dead), https://www.softpedia.com/get/Internet/Other-Internet-Related/K9-Web-Protection.shtml.Hash:cc4991eb3b671cc1935c04a0673f7dceefb41bc4143a6d99513eaaab1d02ab8dVirus Total on that hash:https://www.virustotal.com/en/file/cc4991eb3b671cc1935c04a0673f7dceefb41bc4143a6d99513eaaab1d02ab8d/analysis/1529396238/So figuring it is good?Not sure if this is a free version or not?Doesn't seem to run on XP, which I'm on at the moment.