My guess is that you have to tell WinTex where the MikTex folder is.
Try this path:
C:\Program Files\MiKTeX 2.5\miktex\bin
Alternatively, you can install another latex editor: WinEdt
Just in case you have already installed Adobe Reader 8.0 and you
are using TexnicCenter, there is a bug which can be repaired:
Click https://www.physicsforums.com/blogs/edgardo-22482/texniccenter-adobe-reader-8-0-bugfix-876/ [Broken]