只要我一按键盘是的任何一个键瑞星就提示文件路径C:\WINDOWS\system32\Yvobwswz.dll
病毒名称：Backdoor.PcClient.dm
然后我提示我，我点删除，提示杀毒失败
我到C:\WINDOWS\system32里却又找不到这个Yvobwswz.dll文件
但我用瑞星查毒却查不到
请问一下这是为什么？
我要如何解决
用HijackThis1991zww扫描日志
HijackThis_815汉化版扫描日志 V1.99.1
保存于 9:41:58, 日期 2005-11-1
操作系统： Windows XP SP2 (WinNT 5.01.2600)
浏览器： Internet Explorer v6.00 SP2 (6.00.2900.2180)
当前运行的进程：
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\PROGRAM FILES\RISING\RAV\CCENTER.EXE
C:\PROGRAM FILES\RISING\RAV\Ravmond.exe
F:\Program Files\Alcohol Soft\Alcohol 120\StarWind\StarWindService.exe
C:\WINDOWS\Explorer.EXE
C:\PROGRA~1\RISING\RAV\RAVTIMER.EXE
C:\PROGRA~1\RISING\RAV\RAVMON.EXE
C:\WINDOWS\system32\CTFMON.EXE
C:\Program Files\锐捷网络\Ruijie Supplicant\8021x.exe
C:\WINDOWS\system32\conime.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Documents and Settings\Administrator\桌面\4842302005817230232\HijackThis1991zww.exe
O1 - Hosts: 202.85.22.10 bbs.100free.net
O1 - Hosts: 202.85.22.10 100free.net
O1 - Hosts: 202.85.22.10 www.100free.net
O2 - BHO: ThunderIEHelper Class - {0005A87D-D626-4B3A-84F9-1D9571695F55} - C:\WINDOWS\system32\xunleibho_v8.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - F:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {A5366673-E8CA-11D3-9CD9-0090271D075B} - (no file)
O2 - BHO: (no name) - {A9930D97-9CF0-42A0-A10D-4F28836579D5} - F:\PROGRA~1\KuGoo3\KUGOO3~1.OCX
O4 - 启动项HKLM\\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - 启动项HKLM\\Run: [RavTimer] C:\PROGRA~1\RISING\RAV\RAVTIMER.EXE
O4 - 启动项HKLM\\Run: [RavMon] C:\PROGRA~1\RISING\RAV\RAVMON.EXE -SYSTEM
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\CTFMON.EXE
O9 - 浏览器额外的按钮: 信息检索 - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - F:\PROGRA~1\MICROS~1\OFFICE11\REFIEBAR.DLL
O9 - 浏览器额外的按钮: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - (no file)
O9 - 浏览器额外的“工具”菜单项: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - (no file)
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1130459019750
O17 - HKLM\System\CCS\Services\Tcpip\..\{8ED622F6-9CF8-4F0C-B9F3-7AEF1B148B34}: NameServer = 61.187.98.3,61.187.98.6
O23 - NT 服务: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - NT 服务: Rising Process Communication Center (RsCCenter) - rising - C:\PROGRAM FILES\RISING\RAV\CCENTER.EXE
O23 - NT 服务: RsRavMon Service (RsRavMon) - Beijing Rising Technology Co., Ltd. - C:\PROGRAM FILES\RISING\RAV\Ravmond.exe
O23 - NT 服务: StarWind iSCSI Service (StarWindService) - Rocket Division Software - F:\Program Files\Alcohol Soft\Alcohol 120\StarWind\StarWindService.exe
