"No digital signature" - what should I do?

I just installed XP SP2 two days ago and just tried to download a video editing file recommended to me in another thread. I didn't realize SP2 would pop up warnings when I download files, but okay that's fine. I told it to go ahead and download the file. I think it was when I tried to open it (after scanning) that it popped up again telling me the file had no digital signature. Although I think SP2 is mostly being a hysterical worry-wart, I don't want to take a chance and just blame SP2 and override its warning.

How do I know when it's OK to ignore warnings about signatures and other things that were never brought to my attention until SP2? I always scan everything I download, but beyond that, if I have to make a decision about whether to open things based on other reasons such as this, what am I supposed to base it on? I don't know..

It's this program, if it matters: http://www.snapfiles.com/get/zweistein.html

 

Quite a bit of stuff you download will not be digitally signed. MS are really just warning you to be carefull. Scanning everything you download as you do is a good idea. Another good trick is do a google search for say "snapfiles problems" and if the site is dodgy you will more than likely find lots of info on it.

 

Thanks to both for the info. There don't seem to be problems with that site (well, except it used to be named "webattack"!). Would there be any harm in disabling that SP2 download-warning-toolbar (I guess there's a way) and go back to getting downloads the way I used to?


EDIT: Did you mean to say antivirus updates, etc. do NOT have a digital signature that SP2 recognizes? (Or that they do?)