我在我的C:\WINDOWS文件下发现了很多这个KB（开头后面是数字）.log文本文件。是病毒吗？可以直接扔回收站吗？我随即点了一个内容如下：内容太多，我只复制了前后两头的一点。
Service Pack 是用以下命令行启动的:
***
DoInstallation: CleanPFR failed: 0x2
***
FetchSourceURL: SetupOpenInfFile Failed to open
file: e:\27884ee8c2d17a38b20a1b24b90e4a23\sp2\update\update.url
***
DoInstallation: FetchSourceURL for e:\27884ee8c2d17a38b20a1b24b90e4a23\sp2\update\update.inf Failed
***
LoadFileQueues: SetupGetSourceFile
Location for halaacpi.dll failed: 0xe0000102
***
BuildCabinetManifest:SetupOpenInfFile failed with error INVALID_HANDLE_VALUE
***
AnalyzePhaseZero used 0 ticks
***
No c:\windows\INF\updtblk.inf file
***
SetupFindFirstLine in LoadExclusionList Failed with error: 0xe0000102
***
CreateUninstall = 0,Directory = C:\WINDOWS\$NtUninstallKB821557$
***
Oem driver C:\WINDOWS\System32\DRIVERS\nv4_mini.sys is signed by oem3.CAT and will not be replaced
***
***
Oem driver C:\WINDOWS\help\nvcphu.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvwcphu.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvcpit.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvwcpit.hlp is signed by oem3.CAT and will not be replaced
***
***
Oem driver C:\WINDOWS\help\nvcpja.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvcpnl.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvwcpnl.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvcpno.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvwcpno.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvcppl.hlp is signed by oem3.CAT and will not be replaced
**
Oem driver C:\WINDOWS\help\nvwcppl.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvcppt.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvwcpptb.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvcpru.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvwcpru.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvcpsk.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvwcpsk.hlp is signed by oem3.CAT and will not be replaced
***
Oem driver C:\WINDOWS\help\nvcpsl.hlp is signed by oem3.CAT and will not be ***
Oem driver C:\WINDOWS\help\nvwcpzhc.hlp is signed by oem3.CAT and will not be Oem driver C:\WINDOWS\system32\drivers\ALCXWDM.SYS is signed by oem1.CAT and will not be replaced
***
Oem driver C:\WINDOWS\SOUNDMAN.EXE is signed by oem1.CAT and will not be replaced
***
Oem driver C:\WINDOWS\System32\ALSNDMGR.CPL is signed by oem1.CAT and will not be replaced
***
Oem driver C:\WINDOWS\System32\ALSNDMGR.WAV is signed by oem1.CAT and will not be replaced
***
Oem driver C:\WINDOWS\system32\drivers\ALCXSENS.SYS is signed by oem1.CAT and Oem driver C:\WINDOWS\System32\IPrtCnst.dll is signed by oem0.CAT and will not be replaced
***
AnalyzePhaseOne: used 32938 ticks
***
AnalyzeComponents: Cancelled:
***
AnalyzeComponents used 32938 ticks
***
Downloading 0 files
***
bPatchMode = FALSE
***
Inventory complete: ReturnStatus=1223, 33110 ticks
***
Num Ticks for invent : 33110
***
KB821557 安装程序被取消。
***
Message displayed to the user: KB821557 安装程序被取消。
***
User Input: OK
***
