DLL GB PLUGIN error on start up

DLL GB PLUGIN error on start up
Hi there everyone, good to meet you - this is my first thread so here goes !...

I've seen a similar thread put up a few days ago but as this is a different error message, I'm not sure whether the same solution will apply.

Every start up results in this error message:

" Error loading C:\Program files\GbPluggin\gbiehdst.dll"
The specific module could not be found.

AVG 8 doesn't pick anything up. I've run run a registry fix with CCleaner ( allowed it to fix all problems it found) and kept a back up and also deleted an improcserver 32 key that may have been a virus - nothing has changed. I have now restored the 32 key. ( by the way - I have no idea what this key is or what its for, I just came across these instructions in a thread somewhere)

I'm not sure what the problem is. Should I use Hijack - what is it and is it necessary?
OS is XP.
Any ideas?

Many thanks