Cf client error

hi all i have a big problem with cf client error code number 20_2 i searched about that problems but all the topics that i read didn't help me and i tried to reinstall the game and it doesn't work and the last topic about that problem i think all of them was from 2010 and i didn't see any answer for that bug so if any one that had the same problem could help me my problem is a special case if i entered any game that error comes i think it takes 2sec