You have not defined your profiles yet. As stated by Mike Renfro, you can use the TeXnicCenter wizard to guide you through this process. Essentially you need to tell TeXnicCenter where to look for the MiKTeX executables.
On any of my Windows machines, I have MiKTeX saved to [
C:\Program Files\MiKTeX 2.9]. However, the executables you need are buried further (for 32-bit) [
C:\Program Files\MiKTeX 2.9\miktex\bin] and (for 64-bit) [
C:\Program Files\MiKTeX 2.9\miktex\bin\x64]. Below I'll list which executable should be pointed to for each default profile. Note: Your path may be different from mine if you are not using a Windows 7 machine, not using a 64-bit version of MiKTeX, version 2.9 of MiKTeX, or deviated from a default install. However the principles remain the same.
"Path to (La)TeX complier"
C:\Program Files\MiKTeX 2.9\miktex\bin\x64\latex.exe
"Path to BibTeX executable"
C:\Program Files\MiKTeX 2.9\miktex\bin\x64\bibtex.exe
"Path to MakeIndex executable"
C:\Program Files\MiKTeX 2.9\miktex\bin\x64\makeindex.exe
For Viewers, this will completely depend on your personal preference.
The default Viewer for DVI is:
C:\PROGRAM FILES\MIKTEX 2.9\MIKTEX\BIN\X64\YAP.EXE
For PDF, I link to my Adobe Acrobat executable.
For PS, a default GSWin install links me to
Hope this helps.