I am not able to open some websites.
some sites are opening.
what is the problem ? please help .

I have run hijackthis and i got this log file :

Logfile of HijackThis v1.99.1
Scan saved at 9:18:23 AM, on 9/29/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.5700.0006)
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:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
C:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
C:\Program Files\Common Files\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\system32\hkcmd.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\PROGRA~1\Grisoft\AVG7\avgcc.exe
C:\Program Files\Java\jre1.6.0_01\bin\jusched.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
D:\oracle\ora92\bin\omtsreco.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\eLitecore\Cyberoam Client for 24Online\CyberoamClient.exe
C:\PROGRA~1\Yahoo!\MESSEN~1\ymsgr_tray.exe
D:\oracle\ora92\bin\agntsrvc.exe
d:\oracle\ora92\bin\ORACLE.EXE
C:\WINDOWS\system32\cmd.exe
D:\oracle\ora92\bin\dbsnmp.exe
d:\oracle\ora92\bin\ORACLE.EXE
C:\WINDOWS\system32\slserv.exe
C:\WINDOWS\explorer.exe
C:\WINDOWS\system32\wscntfy.exe
C:\Program Files\IPMsg\ipmsg.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\HijackThis\HijackThis.exe
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,SearchAssistant = http://in.rediff.com/index.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://in.rediff.com/index.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://in.rediff.com/index.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=54729
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?Link...cid={SUB_CLCID}
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://in.rediff.com/index.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = NITESH
R3 - URLSearchHook: (no name) - {12F02779-6D88-4958-8AD3-83C12D86ADC7} - (no file)
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: RealPlayer Download and Record Plugin for Internet Explorer - {3049C3E9-B461-4BC5-8870-4C09146192CA} - C:\Program Files\Real\RealPlayer\rpbrowserrecordplugin.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O3 - Toolbar: (no name) - {12F02779-6D88-4958-8AD3-83C12D86ADC7} - (no file)
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVG7\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_01\bin\jusched.exe"
O4 - HKLM\..\Run: [NeroCheck] C:\WINDOWS\system32\\NeroCheck.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [SearchIndexer] rundll32.exe "C:\WINDOWS\system32\gyffwxum.dll",sitypnow
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Yahoo! Pager] "C:\PROGRA~1\Yahoo!\MESSEN~1\YAHOOM~1.EXE" -quiet
O4 - Global Startup: 24Online Client.lnk = C:\Program Files\eLitecore\Cyberoam Client for 24Online\CyberoamClient.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
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
O11 - Options group: [INTERNATIONAL] International*
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - https://download.macromedia.com/pub/...sh/swflash.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{0D025967-E051-48B2-A65E-FD15D1DED8EB}: NameServer = 202.63.164.17,202.63.164.18
O17 - HKLM\System\CS1\Services\Tcpip\..\{0D025967-E051-48B2-A65E-FD15D1DED8EB}: NameServer = 202.63.164.17,202.63.164.18
O17 - HKLM\System\CS2\Services\Tcpip\..\{0D025967-E051-48B2-A65E-FD15D1DED8EB}: NameServer = 202.63.164.17,202.63.164.18
O18 - Protocol: ms-help - {314111C7-A502-11D2-BBCA-00C04F8EC294} - C:\Program Files\Common Files\Microsoft Shared\Help\hxds.dll
O20 - AppInit_DLLs: avzxamn.dll
O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxsrvc.dll
O20 - Winlogon Notify: qomlkjg - qomlkjg.dll (file missing)
O20 - Winlogon Notify: winrnt32 - winrnt32.dll (file missing)
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
O23 - Service: DomainService - Unknown owner - C:\WINDOWS\system32\jvlqmekx.exe (file missing)
O23 - Service: SQL Server (SQLEXPRESS) (MSSQL$SQLEXPRESS) - Unknown owner - c:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Binn\sqlservr.exe" -sSQLEXPRESS (file missing)
O23 - Service: OracleMTSRecoveryService - Oracle Corporation - D:\oracle\ora92\bin\omtsreco.exe
O23 - Service: OracleOraHome92Agent - Oracle Corporation - D:\oracle\ora92\bin\agntsrvc.exe
O23 - Service: OracleOraHome92ClientCache - Unknown owner - D:\oracle\ora92\BIN\ONRSD.EXE
O23 - Service: OracleOraHome92HTTPServer - Unknown owner - D:\oracle\ora92\Apache\Apache\apache.exe" --ntservice (file missing)
O23 - Service: OracleOraHome92PagingServer - Unknown owner - D:\oracle\ora92/bin/pagntsrv.exe
O23 - Service: OracleOraHome92SNMPPeerEncapsulator - Unknown owner - D:\oracle\ora92\BIN\ENCSVC.EXE
O23 - Service: OracleOraHome92SNMPPeerMasterAgent - Unknown owner - D:\oracle\ora92\BIN\AGNTSVC.EXE
O23 - Service: OracleOraHome92TNSListener - Unknown owner - D:\oracle\ora92\BIN\TNSLSNR.exe (file missing)
O23 - Service: OracleServiceKIRTI - Oracle Corporation - d:\oracle\ora92\bin\ORACLE.EXE
O23 - Service: OracleServiceNITESH - Oracle Corporation - d:\oracle\ora92\bin\ORACLE.EXE
O23 - Service: SmartLinkService (SLService) - Smart Link - C:\WINDOWS\SYSTEM32\slserv.exe

Please Reply........... Thanks in advance.