That isn't a code, that's a file. And it seems to be a rather uncommon file, since your post is the only mention of "ctverifier.dll" google finds on the whole world wide web.
What exactly is the error that makes you post this question? When does it appear, and what changed before it started to appear?
need help please ,with C:\Users\Bob\AppData\Local\Temp\CTVerifier.dll did not want to buy whole programme just to fix this problem Thank You