Hi,
From my experience, after installing a cumulative update, some programs/games need to be reinstalled. Kindly reinstall Nascar Racing 2003 Season in the compatibility mode and run it as Administrator to see the result.
Also, Running this command in command prompt as administrator
bcdedit.exe /set {current} nx AlwaysOff
If above methods fail, it should be a compatibility issue, because Windows 10 1607 version makes an improvement on security, which cause this game can’t run. If you want to play it, roll back to previous version or install a VM seems to make sense.
Regards
Please remember to mark the replies as an answers if they help and
unmark them if they provide no help.
If you have feedback for TechNet Subscriber Support, contact
tnmff@microsoft.com.