Epic games launcher crashes!!!

Epic games launcher crashes with error “unrealCEFsubprocess.exe has stopped working” i;m still stuck in version 4.7 and i can’t download 4.12. very soon i get this error and the launcher crashes. help soon!!! i went through the forums and tried everything. nothing worked. i’m using win 7 with a 2G internet.
sorry couldn’t post this is in “ask a question”.