Original title: Windows 8.1 Live Mail

Using Windows 8.1 Windows Live Mail. After being on the internet on Saturday, the 13th of September, I went back to Live Mail and discovered that all of the contents in my subfolders had been erased. This was the 4th time it had happened. On August 2, I was able to restore all messages and content by using system restore. On the 13th, it happened again and I went to restore history. There were only partial content. So I tried System Restore. Nothing came back. 

I would like to know what caused this as I did not delete anything that I wanted to keep. I understand the messages are gone but what did it? I am very afraid to use Window Live Mail ever again. One person suggested the problem was with McAfee. I do not know. I am no expert and only know what I have learned through trial and error. I hope someone can give me an answer as Microsoft Support can not as I was told they are not trained in Windows Live Mail.