Yes, I had tried those sites time and time again, but strangely when I followed your link to the Sea Monkey site this time it worked!!!
Many thanks for your advice, I don't know how it worked, but it did.
I have tried to install Mozilla Sea Monkey five times and each time SAS has stopped the installation stating that the download is a Trojan. On scanning all SAS shows up are tracking cookies. I have researched the internet and found that there is a Trojan masquerading as Sea Monkey, but the sites I have been downloading from I thought were safe - Mozilla and Cnet.
Anybody else had this problem? I can't find anything to say that this has been logged as a false positive. Is it?
Any comments welcome.