Client 7.8 crush!!!

Hello guys i really need your help.. i had some problems with lol and i uninstalled it and i reinstalled it but when the client begin to download the lol i get this error "Unspecified error occurred. Please check the logs for more information" i tried everything that i read here nut nothing worked.. i open and the Beta Client and i got the "002 error" and tells me that i have to make sure that i have free space in my hard at least 8gb and i have 231 gb free space or the "error 004: Patching failed and we are not sure why. Please restart the client and try to patching again." Please help me i don;t know what else to do!!!