Address 006f6330 is a problem with your DEP settings, they should look like this -

To expand on the above, an explanation by Nick007J:

*The only correct and safe setting is the default one - "use DEP only for..." Explanation. DEP prevents execution from segments that are considered data (it could be used for preventing executing code on the stack). It happens so that for some reason (I assume Securom) VC does execute minor block of code that is present in segment not marked as executable. It is true for all versions of the game. There are two options DEP window offers. First, default one, offers you to have DEP on only for Windows system applications. Second one offers you to have DEP on for all application except ones you choose. Under default option, gta-vc.exe is not going to be affected by DEP. Under second option, DEP is active for gta-vc.exe. If you have second option + exception, you don't have DEP for gta-vc.exe

As you notice, there is no difference between default option and second option + exception. Problem comes when you install mod/convert to JP/change to steam etc. If you had default option, you will never encounter any problems with DEP. You will probably crash (e,g. set file difference), but not because of DEP. If you actually had second option with manual exception, you would have to add exception for new exe. This means DEP settings are absolutely required to be reset to default. There is no advantage or help from changing it whatsoever. Adding exception can only help if you have already made a mistake of touching DEP settings.*