Adobe has a whole set of procedures to troubleshoot the start up of Lightroom. One of their recommendations is:
- Create a new user
- Switch to the new user
- Start Lightroom
Do you still have the same problem?
Why are they asking to create a new user? Adobe wants you to identify if the problem is with the catalog, the preference file or the user permissions.
- The preference file is per user and it could be corrupt:
|OS||Preference File Location|
|Windows Vista||Users\[username]\AppData\Roaming\Adobe\Lightroom\Preferences\Lightroom 2 Preferences.agprefs|
|Windows 7||Users\[username]\AppData\Roaming\Adobe\Lightroom\Preferences\Lightroom 2 Preferences.agprefs|
|Windows Vista||Users\[username]\AppData\Roaming\Adobe\Lightroom\Preferences\Lightroom 3 Preferences.agprefs|
|Windows 7||Users\[username]\AppData\Roaming\Adobe\Lightroom\Preferences\Lightroom 3 Preferences.agprefs|
|Windows XP||Documents and Settings[username]\Application Data\Adobe\Lightroom\Preferences\Lightroom Preferences.agprefs|
So instead of creating a new user, you just have to rename them to Lightroom Preferences.agprefs.original on Windows or com.adobe.Lightroom.plist.original on Mac.
- For Microsoft Windows XP and Windows Vista or 7: the permissions should be “Full Control” for [username] see: from Microsoft
- For Microsoft Windows XP: you should disable Simple File Sharing as described by Microsoft.
- For Apple see: Troubleshooting permissions issues in Mac OS X by Apple.
If that was the problem, then either you will have to restore your preferences from a backup. If it is was not the problem then you can rename the preference file to the original name.
- BTW, Lightroom does NOT backup any of your preferences or photos… Lightroom only backs-up the catalog.
- [username] Is your own user name that you signed on