why wont my game finish patching

I have been trying to get the League of legends to update but it wont, when i open the launcher the update starts at 33% and updates to about 40% to 50% then crashes i have already deleted the game uninstalled it and re-downloaded it and that didnt fix the problem either, i have also tried to right click and run as administrator and that was no help either, if anybody else has been having this problem and fixed please help me to fix it to, also i have been able to log in and play at my friends house but i would still like the game to work at my house as well i have had league of legends for probably about a year or more now and have never had any problems with it and i dont know what to do please help. any information about how to fix this would be great