The Backup Exec for Windows Servers installation log file is located in:
 
10.x and prior - BKUPINST.LOG

C:\Windows\ 
 

11x and later - BKUPINST.HTM

Windows Server 2003 and prior  :   C:\Documents and Settings\All Users\Application Data\Symantec\Backup Exec\Logs\
 
Windows Server 2008 and Vista :   C:\ProgramData\Symantec\Backup Exec\Logs\

BE 2012 - BKUPINST2012.HTM

Windows Server 2003 and prior  :   C:\Documents and Settings\All Users\Application Data\Symantec\Backup Exec\Logs\
 
Windows Server 2008 and Vista :   C:\ProgramData\Symantec\Backup Exec\Logs\
  
 
NOTE: The Application Data folder is a hidden folder. If the Application Data folder is not visible, refer to the Microsoft Windows documentation for instructions on how to display hidden folders.