it wasnt, it started crashing at some areas on the map and kept doing this at the same spots over and over.. only these crashes showed falloutnv.exe in the crash rapport, which was pretty vague, could be anything right? so i searched my way through numerous solutions on google and found one solution that had me playing just now for hours without a single crash, it seems many games released lately dont like the Aero theme that you can use on win7, and since im not planning to enable/disbale the theme every time i play a game, i found out you can disable it for an executable in its properties, so i wont keep you any longer; here it is:
right click on FalloutNV.exe and go to properties, click the compatibility tab, and check "Disable desktop composition", (i also checked run as admin, but dont think this will improve anything, for the fact that im logged in as admin)
played for 2 hours+ straight without any crash, i hope it fixes the crashing for other people as well