iTunes Authorization Data File
3.3 | 3 Votes
What is a SIDD file?
In Windows 7 and 8, iTunes stores SIDD files to the following directory:
C:\ProgramData\Apple Computer\iTunes\SC Info\
iTunes for Windows XP uses this location:
C:\Documents and Settings\All Users\Application Data\Apple Computer\iTunes\SC Info\
NOTE: If iTunes doesn't open after you've installed a new version in Windows, you can fix this by deleting the SC Info.sidb, SC Info.sidd, and SC Info.sidn files from the directories listed above. After deletion, restart your computer and then reopen iTunes.