Logfile of HijackThis v1.99.1
Scan saved at 21:36:56, on 2005-8-27
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\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\Explorer.EXE
C:\WINDOWS\system32\ctfmon.exe
D:\Program Files\Virus Chaser\Vcrmon.exe
H:\Program Files\Java\jre1.5.0_04\bin\jusched.exe
C:\WINDOWS\system32\nvsvc32.exe
D:\Program Files\Virus Chaser\Vcmail.exe
d:\Program Files\Virus Chaser\SpiderNT.exe
d:\Program Files\Virus Chaser\Spiderui.exe
D:\Program Files\BitComet\BitComet.exe
H:\Program Files\Tencent\qq\QQ.exe
H:\Program Files\Tencent\qq\TIMPlatform.exe
H:\Program Files\Tencent\qq\qqpet\qqpet.exe
H:\Program Files\Tencent\TT\TTraveler.exe
E:\HijackThis.exe

O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: ShowBarObject Class - {850B69E4-90DB-4F45-8621-891BF35A5B53} - C:\WINDOWS\system32\alitb\bar.dll
O2 - BHO: IeCatch2 Class - {A5366673-E8CA-11D3-9CD9-0090271D075B} - D:\PROGRA~1\FlashGet\jccatch.dll
O2 - BHO: YiSou - {EF1D17A9-089F-40cc-8D64-7324CDEBA0DB} - C:\PROGRA~1\YiSou\yisoub.dll
O3 - Toolbar: FlashGet Bar - {E0E899AB-F487-11D5-8D29-0050BA6940E3} - D:\PROGRA~1\FlashGet\fgiebar.dll
O3 - Toolbar: 一搜工具条 - {115F6E46-FCBC-41ed-B3B5-3BDDD4AAB5E5} - C:\Program Files\YiSou\yisou.dll
O3 - Toolbar: 卡卡安全助手 - {DB9ECD4F-FB8F-4311-B3CE-90B976C2707C} - C:\WINDOWS\system32\KakaTool.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [Vcrmon] D:\Program Files\Virus Chaser\Vcrmon.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] H:\Program Files\Java\jre1.5.0_04\bin\jusched.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Vcrmon] d:\Program Files\Virus Chaser\Vcrmon.exe
O8 - Extra context menu item: !搜一搜(&S) - res://C:\Program Files\YiSou\yisou.dll/232
O8 - Extra context menu item: Edit with &XML Spy - C:\Program Files\Altova\XMLSPY2004\spy.htm
O8 - Extra context menu item: 使用Kugoo下载 - D:\Program Files\KuGoo2\KugooDownX.htm
O8 - Extra context menu item: 使用网际快车下载 - D:\Program Files\FlashGet\jc_link.htm
O8 - Extra context menu item: 使用网际快车下载全部链接 - D:\Program Files\FlashGet\jc_all.htm
O8 - Extra context menu item: 添加到QQ自定义面板 - H:\Program Files\Tencent\qq\AddPanel.htm
O8 - Extra context menu item: 添加到QQ表情 - H:\Program Files\Tencent\qq\AddEmotion.htm
O8 - Extra context menu item: 用QQ彩信发送该图片 - H:\Program Files\Tencent\qq\SendMMS.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - H:\Program Files\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra 'Tools' menuitem: Sun Java 控制台 - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - H:\Program Files\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra button: 商机直通车 - {13b0c05c-ef05-4bf6-b0ea-f6111af25544} - C:\WINDOWS\system32\alitb\bar.dll
O9 - Extra button: FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - D:\PROGRA~1\FlashGet\flashget.exe
O9 - Extra 'Tools' menuitem: &FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - D:\PROGRA~1\FlashGet\flashget.exe
O9 - Extra button: 易趣购物 - {EE60714F-AC19-427e-861A-FD60ABDF119A} - http://click2.ad4all.net/url2/urlmanage/url.asp?id=1 (file missing)
O9 - Extra 'Tools' menuitem: 易趣购物 - {EE60714F-AC19-427e-861A-FD60ABDF119A} - http://click2.ad4all.net/url2/urlmanage/url.asp?id=1 (file missing)
O9 - Extra button: Edit with XML Spy - {2222EF56-F49E-4d07-A14E-8D2B08766958} - C:\Program Files\Altova\XMLSPY2004\spy.htm (HKCU)
O9 - Extra 'Tools' menuitem: Edit with XML Spy - {2222EF56-F49E-4d07-A14E-8D2B08766958} - C:\Program Files\Altova\XMLSPY2004\spy.htm (HKCU)
O14 - IERESET.INF: START_PAGE_URL=about:blank
O16 - DPF: {3D8F74EE-8692-4F8F-B8D2-7522E732519E} (WebActivater Control) - http://game.qq.com/QQGame2.cab
O16 - DPF: {E4E2F180-CB8B-4DE9-ACBB-DA745D3BA153} (Rising Web Scan Object) - http://download.rising.com.cn/register/pcver/autoupgradepad/Ver2005/OL2005.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{E39F36BF-55C4-4E68-8781-D0EFF447BDA6}: NameServer = 202.96.209.6 202.96.209.133
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Virus Chaser Spider NT (spidernt) - New Technology Wave Inc. - d:\Program Files\Virus Chaser\SpiderNT.exe
经常死机很郁闷啊

【回复“刀刀♂”的帖子】

请关闭所有IE界面，重新使用HijackThis扫描一次，选中下面建议修复的项目，让HijackThis修复，修复前请允许HijackThis保留备份。（如果楼主知道是安全的可以不必勾选）
O2 - BHO: ShowBarObject Class - {850B69E4-90DB-4F45-8621-891BF35A5B53} - C:\WINDOWS\system32\alitb\bar.dll
O9 - Extra button: 商机直通车 - {13b0c05c-ef05-4bf6-b0ea-f6111af25544} - C:\WINDOWS\system32\alitb\bar.dll
O14 - IERESET.INF: START_PAGE_URL=about:blank

然后打开我的电脑→再点工具→打开文件夹选项→查看→把隐藏受保护的系统文件（推荐）和隐藏已知文件类型的扩展名的勾去掉→再显示所有文件→找到以下文件并删除：
C:\WINDOWS\system32\alitb目录

清空IE临时文件夹，扫描整理磁盘看看。

log没什么大问题，

建议修复

O2 - BHO: ShowBarObject Class - {850B69E4-90DB-4F45-8621-891BF35A5B53} - C:\WINDOWS\system32\alitb\bar.dll
O9 - Extra button: 商机直通车 - {13b0c05c-ef05-4bf6-b0ea-f6111af25544} - C:\WINDOWS\system32\alitb\bar.dll

删除
C:\WINDOWS\system32\alitb\整个目录

出现这种情况前您是否安装过什么软件？