I got the same problem
the content in the *.log file is:
*** HOST CONFIGURE ***
u3UnVpuToHostExe returing 0
Executing 'C:\DOCUME~1\ADMINI~1\APPLIC~1\U3\351360~1\1F3062~1\Exec\AvU3Launcher.exe'
*** APP START (0) ***
u3UnVpuToHostExe returing 0
filCreateTempPath returing C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\avu3_ins
filCopyPath returing 0
Executing 'C:\DOCUME~1\ADMINI~1\APPLIC~1\U3\351360~1\1F3062~1\Exec\setup.exe /forceinstall /sfx /sfxstorage "C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\avu3_ins" /savelog "C:\DOCUME~1\ADMINI~1\APPLIC~1\U3\351360~1\1F3062~1\Exec\u3upd_appStart.log"'
sysExecAndWait returing 536870922
*** APP START (1) ***
filCreateTempPath returing C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\avu3_ins
filCopyPath returing 0
Executing 'C:\DOCUME~1\ADMINI~1\APPLIC~1\U3\351360~1\1F3062~1\Exec\setup.exe /forceinstall /sfx /sfxstorage "C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\avu3_ins" /savelog "C:\DOCUME~1\ADMINI~1\APPLIC~1\U3\351360~1\1F3062~1\Exec\u3upd_appStart.log" /verifypkgs'
sysExecAndWait returing 536870922
sysExecAndWait returing 259