This is most unsatisfactory because it appears you have bootmgr on drive C and Windows 7 on drive D.
However, you can change a registry key to point to drive D for future program installations:
Click the Windows Orb (Start), type regedit, press Enter and navigate to registry key
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion. In the right pane, right-click ProgramFilesDir and Modify it to D:\Program Files which will put all newly installed programs on the D drive.