For MSI package installations:
File name: OFCNT.LOG
Location: In a temporary system file, for example in Windows 7:
C:\Users\Administrator\AppData\Local\Trend Micro\Security Agent\OFCNT.LOG
For web installations:
File name: WebInstall.log
Location: C:\
For remote installations:
File name: RemoteInstall.LOG
Location: C:\
For Autopcc and EXE package installations:
File name: OFCNT.LOG
Location: %windir%\