InfeStop Descriptions:

InfeStop is one of the latest counterfeit antispyware that devastates the Internet users today. InfeStop usually come up after you installed a video codec that come with Trojan, malware and virus. InfeStop normally generates fake and misleading system popup error messages so end-users will be tricked into purchase InfeStop.

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Manual InfeStop Removal Instructions:

Unregister InfeStop DLL Files:
(Learn how to do this)
WinLayer.dll
Res.dll
Stop InfeStop Processes:
(Learn how to do this)
InfeStopRemover.exe

Find and Delete these InfeStop:
(Learn how to do this)
%ProgramFiles%\InfeStop\InfeStopRemover.exe
%ProgramFiles%\InfeStop\InfeStopRemover.exe.local
%ProgramFiles%\InfeStop\InfeStopRemover.exe.log
C:\Documents and Settings\All Users\Desktop\InfeStop.lnk
C:\Documents and Settings\All Users\Start Menu\Programs\InfeStop\Register InfeStop.lnk
C:\Documents and Settings\All Users\Start Menu\Programs\InfeStop\Start InfeStop.lnk
C:\Documents and Settings\All Users\Start Menu\Programs\InfeStop\Uninstall.lnk
%ProgramFiles%\InfeStop\Krnel.dll
%ProgramFiles%\InfeStop\msvcp71.dll
%ProgramFiles%\InfeStop\msvcr71.dll
%ProgramFiles%\InfeStop\Res.dll
%ProgramFiles%\InfeStop\signatures.pkg
%ProgramFiles%\InfeStop\Uninstall.exe
%ProgramFiles%\InfeStop\WinLayer.dll

Remove InfeStop Registry Values:
(Learn how to do this)
HKEY_CLASSES_ROOT\CLSID\{BC05D965-B19E-4809-A4A4-D0AD5D6BF441}
HKEY_CLASSES_ROOT\CLSID\{E6BDC02C-E545-4960-8272-F9B47EC6DD95}
HKEY_LOCAL_MACHINE\SOFTWARE\InfeStop
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\InfeStop
HKEY_CLASSES_ROOT\CLSID\{EAE9693B-708B-44DB-AE8D-6C440C0D31DB}
HKEY_CLASSES_ROOT\Interface\{03F58BD9-7FD0-4A98-AB83-584DEE9EA534}
HKEY_CLASSES_ROOT\Interface\{5EB362E7-4E4F-42F6-B446-09A40C5FC2ED}
HKEY_CLASSES_ROOT\Interface\{ECF713F7-7B0A-4278-8B63-48EFF8B9011B}
HKEY_CLASSES_ROOT\Interface\{FD37E18D-79EE-4FB8-91CC-F32B9E0309F5}
HKEY_CLASSES_ROOT\TypeLib\{F4753DB8-81B9-4614-A0BA-2642CF7C309D}

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Source: http://www.xp-vista.com/spyware-removal/infestop-removal-instructions-infestop