AE 7 won't launch after CS3 installed?

If AE 7 won't launch, there could be a number of problems according to Adobe support docs. If you get the error below you have a CS3-related problem and probably have a CS3-specific plug-in installed that'll have to be pulled:
../../../AE_SDK_CS3/Examples/Headers/
SuiteHelper.h:22:failed assertion 'false'