AS has been said this is a known problem when downloading from Daz, using Norton AV. THe problem is you Norton is saying that not enough donwloads of htis type, so it doesn’t recognise it, hence says it MAY be a suspicious file. You should be able to find the file in your quarantined files and move it from there to run it. Once you have downloaded enough Daz files for Norton to recognise them the problem will go away.
Another solution is to use another AV. There are a few good free ones around, that you can try to see if you like them before buying a subscription.