这两天电脑感染病毒，开机后短鸣不已无法进入，按f8或f12后选择菜单可进入winxp，但数字键3给锁住，碰到又输入窗口就会自动不停地输入数字3，nortan曾实时发现Backdoor.Graybird病毒，隔离删除后没再发现，瑞星在线检测也发现有两个病毒，删除文件后也没在发现，但上面的问题确仍然存在，到底什么病毒在作怪？哪位大哥能指点一下？急啊～～

Logfile of HijackThis v1.99.1
Scan saved at 5:20:15 PM, on 9/17/2005
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\csrss.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\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Iparmor\Iparmor.exe
C:\Program Files\TrojanHunter 4.2\THGuard.exe
D:\anti-virus\HijackThis\HijackThis.exe

R3 - Default URLSearchHook is missing
F2 - REG:system.ini: UserInit=userinit.exe,
O2 - BHO: (no name) - {35980F6E-A137-4E50-953D-813BB8556899} - (no file)
O2 - BHO: MMSAssist - {6671A431-5C3D-463d-A7CF-5587F9B7E191} - (no file)
O2 - BHO: std software - {6A512BF7-EC78-4e8d-9841-6C02E8FA9838} - C:\WINDOWS\system32\stdup.dll (file missing)
O2 - BHO: (no name) - {B580CF65-E151-49C3-B73F-70B13FCA8E86} - (no file)
O2 - BHO: YiSou - {EF1D17A9-089F-40cc-8D64-7324CDEBA0DB} - (no file)
O3 - Toolbar: MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Apps\MSN Toolbar\01.02.4000.1001\zh-cn\msntb.dll
O3 - Toolbar: é?í??úê? - {BB936323-19FA-4521-BA29-ECA6A121BC78} - (no file)
O3 - Toolbar: FlashGet Bar - {E0E899AB-F487-11D5-8D29-0050BA6940E3} - C:\PROGRA~1\FlashGet\fgiebar.dll
O4 - HKLM\..\Run: [vptray] C:\PROGRA~1\SYMANT~1\SYMANT~1\vptray.exe
O4 - HKLM\..\Run: [THGuard] "C:\Program Files\TrojanHunter 4.2\THGuard.exe"
O6 - HKLM\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O8 - Extra context menu item: Quick Search (Yisou.com) - res://C:\WINDOWS\downlo~1\CnsMinEx.dll/1003
O14 - IERESET.INF: SEARCH_PAGE_URL=
O14 - IERESET.INF: START_PAGE_URL=
O16 - DPF: {E4E2F180-CB8B-4DE9-ACBB-DA745D3BA153} (Rising Web Scan Object) - http://download.rising.com.cn/register/pcver/autoupgradepad/Ver2005/OL2005.cab
O20 - AppInit_DLLs: APIHookDll.dll
O20 - Winlogon Notify: NavLogon - C:\WINDOWS\System32\NavLogon.dll
O23 - Service: DefWatch - Symantec Corporation - C:\Program Files\Symantec_Client_Security\Symantec AntiVirus\DefWatch.exe
O23 - Service: Symantec AntiVirus Client (Norton AntiVirus Server) - Symantec Corporation - C:\Program Files\Symantec_Client_Security\Symantec AntiVirus\Rtvscan.exe

用木马克星以及木马hunter都没发现什么：（

救命啊～～～

有没人帮忙分析分析这是怎么回事啊？

R3 - Default URLSearchHook is missing
F2 - REG:system.ini: UserInit=userinit.exe,
O2 - BHO: (no name) - {35980F6E-A137-4E50-953D-813BB8556899} - (no file)
O2 - BHO: MMSAssist - {6671A431-5C3D-463d-A7CF-5587F9B7E191} - (no file)
O2 - BHO: std software - {6A512BF7-EC78-4e8d-9841-6C02E8FA9838} - C:\WINDOWS\system32\stdup.dll (file missing)
O2 - BHO: (no name) - {B580CF65-E151-49C3-B73F-70B13FCA8E86} - (no file)
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