Hi Gloria and jcabiria,
Please follow these steps to get back on track:
1. Uninstall the program (using the Uninstall command on your Programs list) or Remove it (using the Add and Remove Software feature in your Control Panel).
2. Delete this directory on your computer:
C:\Program Files\Common Files\MimarSinan\Installation Information\{FB5055E4-9BE1-425F-B40A-33E43E9460DA}
3. Download the SudokuSetup file from
www.sudoku.com/download.htm.4. Pause the "real-time" scanning feature of your anti-virus software and anti-spyware software, if applicable.
5. Install the Sudoku program again, by running the SudokuSetup file.
6. Enter your registration information into the Sudoku program by selecting Enter key
from the File menu.