Sounds like a corrupt .exe file.

Go and reset your downloads at Daz and try downloading them again.

If it is only one item and you have tried to redownload it and it gives you that same error, it could be that the .exe is really corrupt. In that case send a message to Daz through their "Contact Us" and let them know.  Unlike here, store staff do not monitor the forums at Daz.

If it's all of your .exe files that are doing that from Daz, then I would suspect it's something at your end.  If you are behing a router, turn off your firewall and virus scanner. Do not use a download manager.

Those are all of the things I can think of.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi