电脑经常无故重起,还出现文件已破坏,WINDOWS无法启动,怎么回事?下面是系统的扫描,好象也没有病毒?
HijackThis_zww汉化版扫描日志 V1.99.1
保存于      19:51:18, 日期 2006-7-22
操作系统：  Windows XP  (WinNT 5.01.2600)
浏览器：    Internet Explorer v6.00 SP1 (6.00.2600.0000)

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:\Program Files\Rising\Rav\CCenter.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Rising\Rav\Ravmond.exe
c:\program files\rising\rfw\rfwsrv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
c:\program files\rising\rfw\RfwMain.exe
C:\Program Files\Rising\Rav\RavTask.exe
C:\Program Files\Rising\Rav\Ravmon.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\Rising\Rav\RavStub.exe
C:\Program Files\Rising\Rav\Rav.exe
C:\Program Files\Internet Explorer\iexplore.exe
E:\瑞星工具\HijackThis1991zww.exe

O2 - BHO: ThunderBHO - {889D2FEB-5411-4565-8998-1DD2C5261283} - D:\迅雷5\ComDlls\XunLeiBHO_001.dll
O3 - IE工具栏增项: 卡卡上网安全助手 - {DB9ECD4F-FB8F-4311-B3CE-90B976C2707C} - C:\WINDOWS\System32\kakatool.dll
O3 - IE工具栏增项: 电台(&R) - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - 启动项HKLM\\Run: [RfwMain] "C:\Program Files\Rising\Rfw\rfwmain.exe" -Startup
O4 - 启动项HKLM\\Run: [RavTask] "C:\Program Files\Rising\Rav\RavTask.exe" -system
O4 - 启动项HKLM\\Run: [IMSCMig] C:\PROGRA~1\COMMON~1\MICROS~1\IME\IMSC40A\IMSCMIG.EXE /Preload
O4 - 启动项HKLM\\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - 启动项HKLM\\Run: [IMJPMIG8.1] ; rem C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE /Spoil /RemAdvDef /Migration32
O4 - 启动项HKLM\\Run: [PHIME2002A] ; rem C:\WINDOWS\System32\IME\TINTLGNT\TINTSETP.EXE /IMEName
O4 - 启动项HKLM\\Run: [PHIME2002ASync] ; rem C:\WINDOWS\System32\IME\TINTLGNT\TINTSETP.EXE /SYNC
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] ; rem "C:\Program Files\Messenger\msmsgs.exe" /background
O8 - IE右键菜单中的新增项目: &使用迅雷下载 - D:\迅雷5\Program\GetUrl.htm
O8 - IE右键菜单中的新增项目: &使用迅雷下载全部链接 - D:\迅雷5\Program\GetAllUrl.htm
O8 - IE右键菜单中的新增项目: 上传到QQ网络硬盘 - D:\QQ\AddToNetDisk.htm
O8 - IE右键菜单中的新增项目: 添加到QQ自定义面板 - D:\QQ\AddPanel.htm
O8 - IE右键菜单中的新增项目: 添加到QQ表情 - D:\QQ\AddEmotion.htm
O9 - 浏览器额外的按钮: 信息检索 - {92780B25-18CC-41C8-B9BE-3C9C571A8263}? - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - 浏览器额外的按钮: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - 浏览器额外的“工具”菜单项: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O14 - IERESET.INF: START_PAGE_URL=http://www.legend.com
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1146194495512
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1146194461778
O16 - DPF: {D0A29C6C-AA71-4423-8C4A-5998B774C448} (IEDown Class) - http://download.ourgame.com/IEDown4.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{66B382A3-F106-4A0A-A8DB-BE60BA307185}: NameServer = 202.100.64.68 202.96.128.68
O23 - NT 服务: Rising Proxy  Service (RfwProxySrv) - Beijing Rising Technology Co., Ltd. - c:\program files\rising\rfw\rfwproxy.exe
O23 - NT 服务: Rising Personal Firewall Service (RfwService) - Beijing Rising Technology Co., Ltd. - c:\program files\rising\rfw\rfwsrv.exe
O23 - NT 服务: Rising Process Communication Center (RsCCenter) - Beijing Rising Technology Co., Ltd. - 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