A problem of compatibility is present in windows vista and windows 7 when you try to execute PIC C, you may get this message :
2009-05-08_204059 In reality, the problem is user privileges level one ; you have to be an administrator to make it work correctly.
PCW
to resolve this problem by two way:
  • a right click on the icon of PIC C Compiler then “Run as administrator”.
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  • a right click on the icon of PIC C Compiler then “Properties”  then “Compatibility” and check the box of  “Run this program as an administrator”, last and not least hit “OK”.
    PIC C Compiler Compatibility
Download PIC C V4.065: Rapidshare | Mediafire | Box.