Adobe Premiere Pro CS4 – LoadLibraryEX Startup.dll failed with error 127
Please try this also:
Check your scratch disk setting, especially the Media Cache. If Premiere Pro is trying to use a disk that is no longer accessible, or a directory folder that is read only, it causes strange problems. Do not use network drives and if Adobe Media Encoder does not launch, try deleting the AME preferences from C:usersusernameAppDataRoamingAdobeAdobe Media Encoder4.0. Hope it will help you.
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There is a similar case with your problem. The only difference is the version. This problem was also encountered using Adobe Premiere Pro CS5 and was consulted on the Adobe community website. The community staff who replied recommended updating the application to version 5.0.2. The problem was fixed fortunately.
Since your case is somewhat similar, try updating your program to version 4.2.1 since it is the highest update available for Adobe Premiere Pro CS4. To update your program, go to Adobe Premiere Pro CS4 4.2.1 Update and download the update. The update is in a ZIP file so make sure you have WinZip installed on your computer to unpack it. See if this fixes the problem.
Adobe Premiere Pro CS4 supports 32-bit Windows XP Service Pack 2 or higher, Windows Vista (Home Premium, Business, Ultimate, or Enterprise edition) Service Pack 1 or higher both 32-bit and 64-bit.