File not Found

I worked on a part for a few hours then clicked save as and entered a name. I then continued working for a few minutes then saved it again and closed SOLIDWORKS and shut down my computer. I just logged back into my computer and the part appeared in the SOLIDWORKS start up screen but when I clicked to open it, it said part not found. I can still see it in my computer files, but when I open it, it says "An error was encountered when trying to open your file. Contact Technical Support for a possible solution." 

 

I was wondering what I should do or who I should contact.

Edu