关于最近流行的个日志问题

为什么最近的日志中有很多的这个东西啊
这是什么?>
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{44BBA840-CC51-11CF-AAFA-00AA00B6015C}]
    <Microsoft Outlook Express 6><"%ProgramFiles%\Outlook Express\setup50.exe" /APP:OE /CALLER:WINNT /user /install>  [N/A]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{44BBA842-CC51-11CF-AAFA-00AA00B6015B}]
    <NetMeeting 3.01><rundll32.exe advpack.dll,LaunchINFSection C:\WINDOWS\INF\msnetmtg.inf,NetMtg.Install.PerUser.NT>  [(Verified)Microsoft Windows Publisher]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{5945c046-1e7d-11d1-bc44-00c04fd912be}]
    <Windows Messenger 4.7><rundll32.exe advpack.dll,LaunchINFSection C:\WINDOWS\INF\msmsgs.inf,BLC.QuietInstall.PerUser>  [(Verified)Microsoft Windows Publisher]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{6BF52A52-394A-11d3-B153-00C04F79FAA6}]
    <Microsoft Windows Media Player><rundll32.exe advpack.dll,LaunchINFSection C:\WINDOWS\INF\wmp10.inf,PerUserStub>  [(Verified)Microsoft Windows Component Publisher]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{7790769C-0471-11d2-AF11-00C04FA35D02}]
    <通讯簿 6><"%ProgramFiles%\Outlook Express\setup50.exe" /APP:WAB /CALLER:WINNT /user /install>  [N/A]
最后编辑2007-07-12 15:57:09.840000000