Mike, I used to get NIS Sonar blocking many downloads from GotD and other sites, so here are a couple of suggestions (from when I used NIS 2012):
NIS 2012 (I posted on GotD):
1) Create a subfolder called, for instance, “NIS Excludes” within a ‘Downloads’ folder (my designated folder for downloads).
2) Open NIS > Settings > Computer > Antivirus & SONAR Exclusions: “Items to Exclude from Scans:” click on ‘configure’
3) “Add” the entire path of this new subfolder; click Add, Apply, OK
4) Next, on the same page, for “Items to Exclude from Auto-Protect, Sonar …:” click on ‘configure’
5) Again, add the entire path of this subfolder; click Add, Apply, OK
Whenever you download a GotD program (or have another file zapped by SONAR), download it into this subfolder. NIS will exclude anything in that folder from being scanned.
An Alternative (also posted on GotD):
If Norton Sonar blocks startup of the installer you can override it as follows:
- Right click the Norton Security Suite icon in the System Tray and select “View Recent History”.
- Select “SONAR Activity” from the show dropdown.
The event should be listed.
- Click “More Details” at the bottom right
- Click “Options” at the bottom
- Click “Restore This File”
- First un-check “Exclude this risk from future scans” and then re-check it.
- Click “Yes”
- Wait for the process to complete
- Close all Norton screens
Setup should now work properly.
Sometimes, you just have to disable SONAR for 15 minutes . . .
I don't know if either of these will help, but good luck.