I tried uninstalling and reinstalling and it's still happening. I think it's the latest update, because I tried the previous update and there was no problem.

Crashes
1) Start the game
2) Open the console with SHIFT+ESC
3) Enter: "/developer 1" and "/logfile 2" commands
Game should now open in developer mode with logging to file enabled. This should print some more messages which could help identify the issue + saves them to file.
4)Try to reproduce the crash.
After crash a new file should appear inside "%userprofile%\Documents\RealRTCW\main" named "rtcwconsole.log".
5)Post crashlog somewhere (for example on
pastebin.com)
or send it to me personally so I could take a look.

DMed ya