这几天电脑不知得了什么怪病，经常不能上网，我先描述一下近几天的状况，请高手帮忙看看：
12月5日11点左右开机，到12月6日凌晨4点左右突然不能上网，但一切网络设备（modem,router，网卡）正常，连接也正常；
12月6日下午1点左右开机，到3点半左右又不能上网，网络设备正常，连接也正常，然后我用windows优化大师清理注册表和垃圾文件（以前一直这么做，从未出现问题），电脑死机，reset后，电脑要检查磁盘（每次检查到99%后屏幕上就出现一大堆数据一直在跳，好像是临时文件夹的东西，好久都不结束），进不了系统，reset后进入安全模式，然后重启，可以正常进入系统，也能上网了，用最新版的瑞星杀毒，杀了一个病毒Adware.Clicker.YNYW.c ，路径：C:\system volume information\_restore{6468f74b-78c8-4d6c-bfa4-85e7d30d0b23}\rp24,文件：A0007014.exe；
12月7日晚十点多刚开机电脑自己重启（没有碰到reset键），重启后，说从一个严重错误中恢复过来，但不能上网，电脑屏幕右下角连接小电脑未出现，网卡指示灯不亮，重启后一切恢复正常，到了凌晨3点左右又不能上网，网络设备正常,我要系统还原到前几天也还原不了。
我总结了一下，好像就是开机后几个小时就不能上网了。
我的操作系统windows xp ,sp2
当前进程:
Logfile of HijackThis v1.99.1
Scan saved at 11:32:25, on 2005-12-8
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:\PROGRAM FILES\RISING\RAV\CCENTER.EXE
C:\Program Files\rising\Rfw\rfwsrv.exe
C:\Program Files\rising\Rav\Ravmond.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\rising\Rav\RavStub.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\DRIVERS\CDANTSRV.EXE
C:\Program Files\rising\Rfw\RfwMain.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe
C:\Program Files\Analog Devices\SoundMAX\Smtray.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\rising\Rav\RavTask.exe
C:\Program Files\rising\Rav\Ravmon.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\RUNDLL32.EXE
D:\qq\QQ.exe
D:\qq\TIMPlatform.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
E:\hijackthis\HijackThis.exe
R3 - URLSearchHook: 上网助手 - {BB936323-19FA-4521-BA29-ECA6A121BC78} - C:\Program Files\3721\Assist\asbar.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: yPhtb - {33BBE430-0E42-4f12-B075-8D21ACB10DCB} - C:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yphtb.dll (file missing)
O2 - BHO: Anti Fish - {38928D50-8A48-44C2-945F-D2F23F771410} - C:\Program Files\3721\Assist\Angling.dll
O2 - BHO: YDragSearch - {62EED7C6-9F02-42f9-B634-98E2899E147B} - C:\PROGRA~1\Yahoo!\ASSIST~1\Assist\YDRAGS~1.DLL (file missing)
O2 - BHO: IeCatch2 Class - {A5366673-E8CA-11D3-9CD9-0090271D075B} - D:\FLASHGET\jccatch.dll
O2 - BHO: AssistII - {BB936323-19FA-4521-BA29-ECA6A121BC78} - C:\Program Files\3721\Assist\asbar.dll
O2 - BHO: NTIECatcher Class - {C56CB6B0-0D96-11D6-8C65-B2868B609932} - D:\Xi\Net Transport\NTIEHelper.dll
O3 - Toolbar: 上网助手 - {BB936323-19FA-4521-BA29-ECA6A121BC78} - C:\Program Files\3721\Assist\asbar.dll
O4 - HKLM\..\Run: [IMJPMIG8.1] "C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE" /Spoil /RemAdvDef /Migration32
O4 - HKLM\..\Run: [PHIME2002ASync] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /SYNC
O4 - HKLM\..\Run: [PHIME2002A] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /IMEName
O4 - HKLM\..\Run: [Smapp] C:\Program Files\Analog Devices\SoundMAX\Smtray.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [RfwMain] "C:\Program Files\rising\Rfw\rfwmain.exe" -Startup
O4 - HKLM\..\Run: [UserFaultCheck] %systemroot%\system32\dumprep 0 -u
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [IMSCMIG40W] C:\PROGRA~1\COMMON~1\MICROS~1\IME\IMSC40W\IMSCMIG.EXE /SetPreload /Log
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [IMSCMig] C:\PROGRA~1\COMMON~1\MICROS~1\IME\IMSC40A\IMSCMIG.EXE /Preload
O4 - HKLM\..\Run: [RavTask] "C:\Program Files\rising\Rav\RavTask.exe" -system
O4 - HKLM\..\Run: [RavTimer] C:\PROGRA~1\RISING\RAV\RAVTIMER.EXE
O4 - HKLM\..\Run: [RavMon] C:\PROGRA~1\RISING\RAV\RAVMON.EXE -SYSTEM
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NVMCTRAY.DLL,NvTaskbarInit
O8 - Extra context menu item: 使用影音传送带下载 - D:\XI\NETTRA~1\NTAddLink.html
O8 - Extra context menu item: 使用影音传送带下载全部链接 - D:\XI\NETTRA~1\NTAddList.html
O8 - Extra context menu item: 使用网际快车下载 - D:\FLASHGET\jc_link.htm
O8 - Extra context menu item: 使用网际快车下载全部链接 - D:\FLASHGET\jc_all.htm
O8 - Extra context menu item: 导出到 Microsoft Office Excel(&X) - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: 手机短信 - {00000000-0000-0001-0001-596BAEDD1289} - http://sms.3721.com/ie/index.htm (file missing)
O9 - Extra button: 寻宝乐趣多 - {59BC54A2-56B3-44a0-93E5-432D58746E26} - http://hot.3721.com/rd/shop_btn.htm (file missing)
O9 - Extra button: 上网助手 - {5D73EE86-05F1-49ed-B850-E423120EC338} - http://assistant.3721.com/index.htm?fb=Cns (file missing)
O9 - Extra button: 信息检索 - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - D:\PROGRA~1\MICROS~1\OFFICE11\REFIEBAR.DLL
O9 - Extra button: FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - D:\FLASHGET\flashget.exe
O9 - Extra 'Tools' menuitem: &FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - D:\FLASHGET\flashget.exe
O9 - Extra button: 易趣购物 - {DE607143-AC19-423e-869A-9D70ABDF119A} - http://click2.ad4all.net/url2/urlmanage/url.asp?id=5 (file missing)
O9 - Extra 'Tools' menuitem: 易趣购物 - {DE607143-AC19-423e-869A-9D70ABDF119A} - http://click2.ad4all.net/url2/urlmanage/url.asp?id=5 (file missing)
O9 - Extra button: 情景聊天 - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - http://cn.rd.yahoo.com/home/messenger/bjk/clientbtn/?http://cn.messenger.yahoo.com/ (file missing)
O9 - Extra button: (no name) - {ECF2E268-F28C-48d2-9AB7-8F69C11CCB71} - http://assistant.3721.com/security1.htm?fb=Cns (file missing)
O9 - Extra 'Tools' menuitem: 修复浏览器 - {ECF2E268-F28C-48d2-9AB7-8F69C11CCB71} - http://assistant.3721.com/security1.htm?fb=Cns (file missing)
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra button: (no name) - {FD00D911-7529-4084-9946-A29F1BDF4FE5} - http://assistant.3721.com/clean1.htm?fb=Cns (file missing)
O9 - Extra 'Tools' menuitem: 清理上网记录 - {FD00D911-7529-4084-9946-A29F1BDF4FE5} - http://assistant.3721.com/clean1.htm?fb=Cns (file missing)
O11 - Options group: [!CNS] 上网助手-地址栏搜索
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage) - http://go.microsoft.com/fwlink/?linkid=36467&clcid=0x409
O16 - DPF: {1F831FA1-42FC-11D4-95A6-0080AD30DCE1} (InstaFred) -
file://D:\Program Files\AutoCAD 2002\InstFred.ocx
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://spaces.msn.com//PhotoUpload/MsnPUpld.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1122543435015
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1132241450921
O16 - DPF: {78AF2F24-A9C3-11D3-BF8C-0060B0FCC122} (AcDcToday 控件) -
file://D:\Program Files\AutoCAD 2002\AcDcToday.ocx
O16 - DPF: {AE563722-B4F5-11D4-A415-00108302FDFD} (NOXLATE-BANR) -
file://D:\Program Files\AutoCAD 2002\InstBanr.ocx
O16 - DPF: {F281A59C-7B65-11D3-8617-0010830243BD} (AcPreview 控件) -
file://D:\Program Files\AutoCAD 2002\AcPreview.ocx
O17 - HKLM\System\CCS\Services\Tcpip\..\{C7EA09A8-DF1D-4869-ADEA-8D2497BC372E}: NameServer = 61.177.7.1,221.228.255.1
O23 - Service: Autodesk Licensing Service - Autodesk - C:\Program Files\Common Files\Autodesk Shared\Service\AdskScSrv.exe
O23 - Service: C-DillaSrv - C-Dilla Ltd - C:\WINDOWS\system32\DRIVERS\CDANTSRV.EXE
O23 - Service: ELSA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Rising Personal Firewall Service (RfwService) - Beijing Rising Technology Corporation Limited - C:\Program Files\rising\Rfw\rfwsrv.exe
O23 - Service: Rising Process Communication Center (RsCCenter) - Beijing Rising Technology Co., Ltd. - C:\PROGRAM FILES\RISING\RAV\CCENTER.EXE
O23 - Service: RsRavMon Service (RsRavMon) - Beijing Rising Technology Co., Ltd. - C:\Program Files\rising\Rav\Ravmond.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe
