computador nao desliga, que eu faço?

nao consigo desligar meu computador, tem que ser no braço. E quando ligo aparece uma janela com mensagem de "socket error"

desde jah agradeço por informações.
Obrigado

Abraços
Schwartz

eis o log gerado pelo HijackThis:

Logfile of HijackThis v1.99.1
Scan saved at 02:04:32, on 24/01/2006
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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:\Arquivos de programas\Ahead\InCD\InCDsrv.exe
C:\WINDOWS\Explorer.EXE
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccSetMgr.exe
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\System32\VTTimer.exe
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccApp.exe
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\Security Center\UsrPrmpt.exe
C:\Arquivos de programas\CyberLink DVD Solution\PowerDVD\PDVDServ.exe
C:\Arquivos de programas\Ahead\InCD\InCD.exe
C:\ARQUIV~1\MYWEBS~1\bar\1.bin\mwsoemon.exe
C:\WINDOWS\System32\system32.exe
C:\Arquivos de programas\CyberLink DVD Solution\Multimedia Launcher\PowerBar.exe
C:\Arquivos de programas\Macrogaming\SweetIM\SweetIM.exe
C:\Arquivos de programas\Picture Package\Picture Package Menu\SonyTray.exe
C:\Arquivos de programas\Picture Package\Picture Package Applications\Residence.exe
C:\Arquivos de programas\Norton AntiVirus\navapsvc.exe
C:\Arquivos de programas\Norton AntiVirus\AdvTools\NPROTECT.EXE
C:\Arquivos de programas\Norton AntiVirus\SAVScan.exe
C:\WINDOWS\system32\slserv.exe
C:\Arquivos de programas\Analog Devices\SoundMAX\SMAgent.exe
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\WINDOWS\System32\wuauclt.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Nova pasta\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://g.msn.com.br/0SEPTBR/SAOS01
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.hotmail.com/
R3 - URLSearchHook: (no name) - {00A6FAF6-072E-44cf-8957-5838F569A31D} - C:\Arquivos de programas\MyWebSearch\SrchAstt\1.bin\MWSSRCAS.DLL (file missing)
O2 - BHO: HomepageBHO - {e0103cd4-d1ce-411a-b75b-4fec072867f4} - C:\WINDOWS\System32\hp57E4.tmp (file missing)
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Arquivos de programas\Norton AntiVirus\NavShExt.dll (file missing)
O3 - Toolbar: MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Arquivos de programas\MSN Apps\MSN Toolbar\01.02.4000.1001\pt-br\msntb.dll (file missing)
O3 - Toolbar: &Rádio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [VTTimer] VTTimer.exe
O4 - HKLM\..\Run: [ccApp] "C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [Advanced Tools Check] C:\ARQUIV~1\NORTON~1\AdvTools\ADVCHK.EXE
O4 - HKLM\..\Run: [Symantec NetDriver Monitor] C:\ARQUIV~1\SYMNET~1\SNDMon.exe /Consumer
O4 - HKLM\..\Run: [SSC_UserPrompt] C:\Arquivos de programas\Arquivos comuns\Symantec Shared\Security Center\UsrPrmpt.exe
O4 - HKLM\..\Run: [RemoteControl] "C:\Arquivos de programas\CyberLink DVD Solution\PowerDVD\PDVDServ.exe"
O4 - HKLM\..\Run: [InCD] C:\Arquivos de programas\Ahead\InCD\InCD.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [MyWebSearch Email Plugin] C:\ARQUIV~1\MYWEBS~1\bar\1.bin\mwsoemon.exe
O4 - HKLM\..\Run: [system32] C:\WINDOWS\System32\system32.exe
O4 - HKCU\..\Run: [PowerBar] "C:\Arquivos de programas\CyberLink DVD Solution\Multimedia Launcher\PowerBar.exe" /AtBootTime
O4 - HKCU\..\Run: [SweetIM] C:\Arquivos de programas\Macrogaming\SweetIM\SweetIM.exe
O4 - HKCU\..\Run: [MyWebSearch Email Plugin] C:\ARQUIV~1\MYWEBS~1\bar\1.bin\mwsoemon.exe
O4 - Startup: MyWebSearch Email Plugin.lnk = C:\Arquivos de programas\MyWebSearch\bar\1.bin\MWSOEMON.EXE
O4 - Global Startup: Adobe Reader Speed Launch.lnk = C:\Arquivos de programas\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: MyWebSearch Email Plugin.lnk = C:\Arquivos de programas\MyWebSearch\bar\1.bin\MWSOEMON.EXE
O4 - Global Startup: Picture Package Menu.lnk = ?
O4 - Global Startup: Picture Package VCD Maker.lnk = ?
O8 - Extra context menu item: &Search - http://bar.mywebsearch.com/menusearch.html?p=ZCxdm485YYBR
O8 - Extra context menu item: E&xportar para o Microsoft Excel - res://C:\ARQUIV~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O14 - IERESET.INF: SEARCH_PAGE_URL=&http://home.microsoft.com/intl/br/access/allinone.asp
O16 - DPF: {1D4DB7D2-6EC9-47A3-BD87-1E41684E07BB} - http://ak.imgfarm.com/images/nocache/funwebproducts/ei/CursorManiaFWBInitialSetup1.0.0.15.cab
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab31267.cab
O16 - DPF: {8C875948-9C60-4381-9248-0DF180542D53} (HbtInstObj) - http://installs.hotbar.com/installs/hbtools/programs/hbtools.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab31267.cab
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/MsnMessengerSetupDownloader.cab
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\ARQUIV~1\MSNMES~1\msgrapp.dll" (file missing)
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Password Validation (ccPwdSvc) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccPwdSvc.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccSetMgr.exe
O23 - Service: InCD Helper (InCDsrv) - Ahead Software AG - C:\Arquivos de programas\Ahead\InCD\InCDsrv.exe
O23 - Service: Norton AntiVirus Auto Protect Service (navapsvc) - Symantec Corporation - C:\Arquivos de programas\Norton AntiVirus\navapsvc.exe
O23 - Service: Norton Unerase Protection (NProtectService) - Symantec Corporation - C:\Arquivos de programas\Norton AntiVirus\AdvTools\NPROTECT.EXE
O23 - Service: SAVScan - Symantec Corporation - C:\Arquivos de programas\Norton AntiVirus\SAVScan.exe
O23 - Service: ScriptBlocking Service (SBService) - Symantec Corporation - C:\ARQUIV~1\ARQUIV~1\SYMANT~1\SCRIPT~1\SBServ.exe
O23 - Service: SmartLinkService (SLService) - - C:\WINDOWS\SYSTEM32\slserv.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\SNDSrvc.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Arquivos de programas\Analog Devices\SoundMAX\SMAgent.exe
O23 - Service: Symantec Core LC - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\CCPD-LC\symlcsvc.exe
O23 - Service: SymWMI Service (SymWSC) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\Security Center\SymWSC.exe