Pete,

Sorry to hear you’re still having problems.
I thought killing off the startup scripts would be a satisfactory work around.

Whenever you get a Windows error message “Entry Point Not Found” for a Dynamic Link Library file (.dll), it usually means: something is making a call to it, and it is not the correct version it is looking for.
In your case it is most likely one of the older plugins you dragged/dropped from PS7 not recognizing the newer version of the .dll.

At this point there are several things for you to try…
Go back in and make sure you have removed “all” of the plugins you dropped into PSCS3.

If that turns up nothing, I would remove the plugins from your system using Windows ADD/REMOVE.
What that (hopefully) should do, is remove any references in the registry pointing to a startup in CS3, which was created when you moved the plugins.
Note: Plugins nowadays are programs (like you mentioned) and will create registry entries, check for updates, etc.
Remove them one at a time, till you find the culprit(s), then you can re-install back to just PS7.

If that fails you probably will  have to do a “System Restore” back to a time before you moved the plugins.

 

 Good Luck,

Chuck (SWAMP)