Not just NAV. . .I was able to install the game yesterday only by first disabling McAfee's Antivirus ActiveShield (I also got rid of all the other active stuff in the McAfee Internet Security suite as well, just to be safe). With the AV enabled, the CD was just spin and the HDD would churn, but nothing else would happen.
Once installed though, the game runs just fine with all that stuff enabled.