NIS 2011 WIPED ALL MY FILES

Hi, 

 

I am not very technical with PCs and Laptops and such, But i did a system restore with computer because of a bad restart. and I tried opening norton, it did not work so i looked online and i saw solutions about reinstalling it, so i unistalled the old version then downloaded norton again, it prompted me to restart.. once i pressed restart and it rebooted it wiped all my files and programs.. my files are still tehre but none are opening anymore.. i do not understand why this has happened and I hope someone could help me with this solution. thank you..