By the way, until now I used a batch-file for avoiding the setup routine of KB890830 (Malicious Software Removal Tool), but it does not work any more as expected. FFCBCFA5-4EA1-4d66-A3DC-224C8006ACAE is the correct version identifier for the Feb07-Version 1.26, but Windows Update shows me that I have to install the Jul06-Version 1.18 of KB890830. If I install that version, it shows me the Feb07-Update next of course. Anyone else with the problem or any solution? Batch file i use: REG ADD "HKLM\SOFTWARE\Microsoft\RemovalTools\MRT" /V "EULA" /t REG_DWORD /D "00000001" /F REG ADD "HKLM\SOFTWARE\Microsoft\RemovalTools\MRT" /v "Version" /t REG_SZ /d "FFCBCFA5-4EA1-4d66-A3DC-224C8006ACAE" /f REG ADD "HKLM\SOFTWARE\Policies\Microsoft\MRT" /v "DontReportInfectionInformation" /t REG_DWORD /D "00000001" /F