I sometimes get this message along with a runtime error when I start up Premiere CS4. Vista Ultimiate 64. The program seems to work fine. How do I troubleshoot/fix?
PProHeadless.exe normally kicks in when you're running Media Encoder. It isn't a Windows problem. It might be that this element of the Adobe install is not quite right and you need to re-install. Does a comp reboot temporarily cure the problem?
If it does then you might be utilising another program in your comp that is affecting it. If the re-boot does nothing - try the reinstall.