Vista keeps crashing

I am working on my husband's laptop and I am at a loss. I'm good with the basics and I am currently running a security scan, but the whole system will just shut down right in the middle of a task....it does this probably 5 times a day. I ran a scan on hijacker and I am posting the log file on this post. What should I try first? Thanks in advance for all of your help!

Logfile of HijackThis v1.99.1
Scan saved at 4:46:35 PM, on 1/21/2010
Platform: Unknown Windows (WinNT 6.00.1906 SP2)
MSIE: Internet Explorer v8.00 (8.00.6001.18865)

Running processes:
C:\Windows\system32\taskeng.exe
C:\Windows\system32\Dwm.exe
C:\Program Files\Seagate\SystemTray\StxMenuMgr.exe
C:\Windows\Explorer.EXE
C:\Program Files\Synaptics\SynTP\SynTPStart.exe
C:\Windows\RtHDVCpl.exe
C:\Program Files\Sierra Wireless Inc\WebUpdater\TRUUpdater.exe
C:\Program Files\Sierra Wireless Inc\3G Watcher\WaHelper.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Dealio Toolbar\SearchSettings.exe
C:\Windows\ehome\ehtray.exe
C:\Program Files\Windows Media Player\wmpnscfg.exe
C:\Program Files\The Weather Channel FW\Desktop\DesktopWeather.exe
C:\Windows\ehome\ehmsas.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\Synaptics\SynTP\SynToshiba.exe
C:\Program Files\Yahoo!\Messenger\ymsgr_tray.exe
C:\Windows\system32\wbem\unsecapp.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\windows live safety center\wlschost.EXE
C:\Program Files\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.toshibadirect.com/dpdstart
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/?LinkId=69157
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R3 - URLSearchHook: (no name) - {E312764E-7706-43F1-8DAB-FCDD2B1E416D} - C:\Program Files\Dealio Toolbar\SearchSettings.dll
O1 - Hosts: ::1 localhost
O2 - BHO: Dealio Toolbar - {01398B87-61AF-4FFB-9AB5-1A1C5FB39A9C} - C:\Program Files\Dealio Toolbar\DealioToolbarIE.dll
O2 - BHO: NCO 2.0 IE BHO - {602ADB0E-4AFF-4217-8AA1-95DAC4DFA408} - C:\Program Files\Common Files\Symantec Shared\coShared\Browser\2.0\coIEPlg.dll
O2 - BHO: Symantec Intrusion Prevention - {6D53EC84-6AAE-4787-AEEE-F4628F01010C} - C:\PROGRA~1\COMMON~1\SYMANT~1\IDS\IPSBHO.dll
O2 - BHO: (no name) - {E312764E-7706-43F1-8DAB-FCDD2B1E416D} - C:\Program Files\Dealio Toolbar\SearchSettings.dll
O3 - Toolbar: Dealio Toolbar - {01398B87-61AF-4FFB-9AB5-1A1C5FB39A9C} - C:\Program Files\Dealio Toolbar\DealioToolbarIE.dll
O3 - Toolbar: The Weather Channel Toolbar - {2E5E800E-6AC0-411E-940A-369530A35E43} - C:\Windows\System32\TwcToolbarIe7.dll
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~3\Office10\EXCEL.EXE/3000
O10 - Unknown file in Winsock LSP: c:\windows\system32\nlaapi.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\napinsp.dll
O10 - Unknown file in Winsock LSP: c:\program files\bonjour\mdnsnsp.dll
O11 - Options group: [INTERNATIONAL] International
O16 - DPF: {3860DD98-0549-4D50-AA72-5D17D200EE10} (Windows Live OneCare safety scanner control) - http://cdn.scan.onecare.live.com/resource/download/scanner/en-us/wlscctrl2.cab
O23 - Service: @%SystemRoot%\ehome\ehstart.dll,-101 (ehstart) - Unknown owner - %windir%\system32\svchost.exe (file missing)
O23 - Service: @gpapi.dll,-112 (gpsvc) - Unknown owner - %windir%\system32\svchost.exe (file missing)
O23 - Service: @%SystemRoot%\system32\qwave.dll,-1 (QWAVE) - Unknown owner - %windir%\system32\svchost.exe (file missing)
O23 - Service: @%SystemRoot%\system32\seclogon.dll,-7001 (seclogon) - Unknown owner - %windir%\system32\svchost.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - %ProgramFiles%\Windows Media Player\wmpnetwk.exe (file missing)

 

I'm pretty sure the fans are not working, and it does get pretty hot, even the keyboard is getting hot. I'll look into that, but another thing that I noticed is when I tried to run the Windows Update, it comes back with an error and it actually says "Most recent updates.......Never"..???