Malwarebytes
For Windows XP:
C:\Documents and Settings\All Users\Application Data\Malwarebytes\Malwarebytes Anti-Malware\Logs\
For Windows 7:
C:\ProgramData\Malwarebytes\Malwarebytes Anti-Malware\Logs\
Sample Log Files: mbam-log-2016-02-22 (10-21-21).xml
AdwCleaner
For Windows XP:
C:\AdwCleaner\
For Windows 7:
C:\AdwCleaner\
Sample Log File: AdwCleaner[R0].txt, AdwCleaner[S0].txt
ESET Online Scanner
For Windows 7:
C:\users\%userprofile%\appdata\local\temp\log.txt
RogueKiller
For Windows XP:
C:\Documents and Settings\All Users\Application Data\RogueKiller\Logs\
For Windows 7:
C:\ProgramData\RogueKiller\Logs\
Sample Log Files: RKreport_SCN_02162016_144616.json, RKreport_DEL_02162016_123020.json
ComboFix
For Windows XP:
C:\Qoobox\
For Windows 7:
C:\Qoobox\
Sample Log File: ComboFix.txt, ComboFix2.txt, ComboFix3.txt
Microsoft Security Scanner
For Windows XP:
C:\Windows\Debug\
For Windows 7:
C:\Windows\Debug\
Sample Log File: msert.log