Hi all new here to this forum just a quick question about downloading,when I get it all ready and i run the .exe file I get a installer corrupted or possible virus message that says the files are no good.Also it says to try the /ncrc command switch? what is that all about?

I have tried downloading about 10 diferent times with the seperate parts,and the other way with the comlpete version,

any help would be greatly appriciated thanks in advance.