Reply to "<filename> could not be played due to a missing or corrupt file"

I just got a new laptop the other day, and after successfully transferring my entire music library, I'm now getting these messages in Traktor for multiple tracks that used on a regular basis.

The aforementioned tracks still play inside itunes, but not in Traktor.

I went back to my old computer and these tracks played fine in Traktor and iTunes.

The other problem I've experienced is that iTunes forgot some of the metadata on my tracks forcing me to reset the artist, genre, etc.

Has anyone had this problem, or know why it happens?

I found a "knowledge base" on the NI site, and I'm currently working on it but was wondering if anyone here has a solution.