How do I get my old Solitaire game back?

If Solitaire didn’t open from run (i.e you have actually deleted it) then Try this:

1. Go to the Control Panel.
2. Open "Add/Remove Programs"
3. Along the left side, click "Add/Remove Windows Components"
4. Double click the "Accessories and Utilities" option.
5. Double click the "Games" option.
6. Select "Solitaire"