Using all my Resource usage

[CREEPYxDAVID 0]

When i install cars to replace my police cars some of them when i go to use them that my gta stops and gives me an error saying that it used all my data or something (I dont know the error of the top of my head) and the cars i want to use are really cool looking and i just cant use them is there a way to fix this from happening like raising my resource data stuff or is there no fix? (i also dont have a screenshot of it cause i just dont use those cars anymore so i dont get the error).

[Sheepish2 31]

change the theme to windows classic, turn off extra programs running the task bar and turn off the services you dont need. also when your about to play reboot since when you reboot you shouldn't start with heaps of services or start with heaps of programs either

Good luck