Error message for OS current update

Question

We have a Mac desktop and are currently running OS X 10.8.3.  We received notification of availability for update to  received notification for update to 11.0.2.  When we attempt to update, we receive an error message which states "an error has occurred while installing updates (103)".  We have had the computer since last August and have successfully updated it as updates became available.  The computer is currently "authorized" with the Apple store and iTunes.  Any information for addressing this issue would be appreciated.
We are hopeful that resolution of this update issue will also address an recently discovered problem accessing photographs in our library.  When accessing or attempting to access older photographs, we receive an error stating that we need to repair the library and also receive an error code 103.  When we click repair library, nothing appears to happen and the issue is unresolved.
Given the similar error codes, we believe that these are interrelated issues.  We would appreciate thoughts and comments.
PB and JT

Answer 1

Test after each of the following steps until the problem is resolved.
Step 1
If you're trying to install more than one update at the same time, do the installations one at a time.
Step 2
Triple-click the line below to select it:  
/Library/Updates
Right-click or control-click the highlighted line and select
Services ▹ Open
from the contextual menu. A folder should open. Move the contents to the Trash. You may be prompted for your administrator password.