I frequently make use of Amazon Prime’s Instant Video access on my Xbox.  Recently, I had begun receiving error “MP1026” on the system when trying to play content.  The error was doggedly persistent.  I restarted the Xbox, signed in and out of Xbox Live, and reinstalled the Amazon app countless times.  I finally appealed to Amazon’s support via email.

Annoyingly, the support tech suggested I call in to receive further tech support, not knowing how to resolve the elusive MP1026.  (At least he admitted his inability to solve the problem, as opposed to sending me a worthless, canned reply.)  Perhaps by accident, I discovered my own resolution to the problem.

Going through the storage section of my Xbox: I nuked the Amazon app, the Amazon “Title Update,” and all the cache files.  I had previously deleted all but the latter several times prior.  I guess nuking the Xbox’s cache files did the trick, because now I can watch videos again without getting the dreaded MP1026 error.

Maybe this will help other folks out there…