If this happens, the solution is to remove the NTFS drive/partition from the Spotlight search list (who would have ever guessed this?). To do so, go to Spotlight in System Preferences and select the Privacy tab. From here, click the Plus (+) button and add the relevant NTFS drive/partition to the list of items that Spotlight will not search. As an alternative, if you can determine the specific utility that is causing the symptom, you may be able to disable it from the utility's own preferences.

Summarizing across several of the Knowledge Base articles (and especially ), here is Apple's generic MAS troubleshooting advice:

• If a problem is specific to an individual app, delete the app from your drive and select to reinstall it from the App Store. Even if it was a purchased app, it will reinstall for free.

• Try the all-purpose cure-all: Restart your Mac.

• Reinstall Mac OS X 10.6.6 via the .