A family of Microsoft relational database management systems designed for ease of use.
Alex Dinulovic,
Can you open Project itself? How about other Office applications (e.g. Word, Excel, etc.)?
If you can't open Project at all, I suggest you try a repair through the Control Panel. If Project opens, can you create a new Project file?
If you can open Project and create a new project but still can't open the file you were working on when your computer crashed, you could try using method 3 in the following Wiki article. If that doesn't work, then I'm afraid your only choice, if you don't have a backup copy, is to start over or try a third party recovery application.
John