Keep getting security warning..

Hi,For most of the NDS downloads i get a security warning,actually its mostly the newer roms....never happened before,any ideas? Or should I just go ahead anyway? Thanks for any advice.

Security warning by what?

you NEED to put more detail mate, but since I'm trying to be nicer, here are some diagnostic checks...1.What is the problem with, downloading roms from this site-not working on a emulator, not working on a flash card?2.If it's your browser it's just a simple security check-it never does that to me anymore-but if it's only affecting certain roms I'm lost...3.If it's not your browser, as in the problem (ie flash card being blocked out) then again, NEED MORE DETAIL...Also it could help if your unsure you SAY what the error says...your to vague mate.

Maybe he's using Vista and it's popping up that annoying "Are you sure you want to do this?" "Really?" "Positive?" "Ok, but are you sure?":)

I have vista-it probabley did that once-I just ticked the warning to shut up...I mean don't remind me :)