Hi, I've been facing this difficulty for quite some time and have tried all kinds of remedies - some of them suggested on this forum, without success. My HP Pavilion zt1135 laptop running XP Home edition 5.1 switches off every time I run a Spybot or NAV 2002 scan. Very rarely, even when there is no scan, the laptop switches off. I have never been able to run a complete system scan due to this problem. I have tried re-installing NAV, have scanned the registry for known trojans and used Symantec scanners for sobig, msblast etc without success. Am now at my wits' end. The HijanThis log is given below. Somebody, pls help ! Logfile of HijackThis v1.97.7 Scan saved at 6:07:50 PM, on 12/6/2003 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:\WINDOWS\Explorer.exe C:\WINDOWS\system32\spoolsv.exe C:\Program Files\Hewlett-Packard\HP Display Settings\hpdisply.exe C:\Program Files\Synaptics\SynTP\SynTPLpr.exe C:\Program Files\Synaptics\SynTP\SynTPEnh.exe C:\PROGRA~1\HPONE-~1\OneTouch.exe C:\windows\system\hpsysdrv.exe C:\WINDOWS\essspk.exe C:\WINDOWS\system32\dla\tfswctrl.exe C:\WINDOWS\System32\S3tray2.exe C:\PROGRA~1\NORTON~1\navapw32.exe C:\WINDOWS\svchost.exe C:\WINDOWS\System32\HPConfig.exe C:\Program Files\Norton AntiVirus\navapsvc.exe C:\Program Files\Internet Explorer\iexplore.exe C:\WINDOWS\System32\dllhost.exe C:\WINDOWS\System32\msdtc.exe C:\WINDOWS\regedit.exe C:\Program Files\Internet Explorer\iexplore.exe C:\Documents and Settings\Owner\Local Settings\temp\Temporary Directory 1 for hijackthis.zip\HijackThis.exe R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.tcs.com/ R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch = R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = sas.ne2.attbb.net:8000 R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.ne2.attbb.net;<local> R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page = about:blank O2 - BHO: (no name) - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Acrobat\ActiveX\AcroIEHelper.ocx O2 - BHO: (no name) - {14b3d246-6274-40b5-8d50-6c2ade2ab29b} - C:\Program Files\Srng\SNHelper.dll__SpybotSDDisabled (file missing) O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll O2 - BHO: (no name) - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Program Files\Norton AntiVirus\NavShExt.dll O2 - BHO: (no name) - {FDD3B846-8D59-4ffb-8758-209B6AD74ACC} - c:\Program Files\Microsoft Money\System\mnyviewer.dll__SpybotSDDisabled (file missing) O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Program Files\Norton AntiVirus\NavShExt.dll O4 - HKLM\..\Run: [HP Display Settings] C:\Program Files\Hewlett-Packard\HP Display Settings\hpdisply.exe /s O4 - HKLM\..\Run: [SynTPLpr] C:\Program Files\Synaptics\SynTP\SynTPLpr.exe O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe O4 - HKLM\..\Run: [CP4HPOT] C:\PROGRA~1\HPONE-~1\OneTouch.exe O4 - HKLM\..\Run: [hpsysdrv] c:\windows\system\hpsysdrv.exe O4 - HKLM\..\Run: [EssSpkPhone] essspk.exe O4 - HKLM\..\Run: [dla] C:\WINDOWS\system32\dla\tfswctrl.exe O4 - HKLM\..\Run: [S3TRAY2] S3tray2.exe O4 - HKLM\..\Run: [NAV Agent] C:\PROGRA~1\NORTON~1\navapw32.exe O4 - Global Startup: Acrobat Assistant.lnk.disabled O4 - Global Startup: Microsoft Office.lnk.disabled O4 - Global Startup: Microsoft Works Calendar Reminders.lnk.disabled O8 - Extra context menu item: &Google Search - res://C:\Program Files\Google\GoogleToolbar1.dll/cmsearch.html O8 - Extra context menu item: Backward &Links - res://C:\Program Files\Google\GoogleToolbar1.dll/cmbacklinks.html O8 - Extra context menu item: Cac&hed Snapshot of Page - res://C:\Program Files\Google\GoogleToolbar1.dll/cmcache.html O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000 O8 - Extra context menu item: Si&milar Pages - res://C:\Program Files\Google\GoogleToolbar1.dll/cmsimilar.html O8 - Extra context menu item: Translate Page - res://C:\Program Files\Google\GoogleToolbar1.dll/cmtrans.html O9 - Extra button: Related (HKLM) O9 - Extra 'Tools' menuitem: Show &Related Links (HKLM) O9 - Extra button: MoneySide (HKLM) O12 - Plugin for .spop: C:\Program Files\Internet Explorer\Plugins\NPDocBox.dll O15 - Trusted Zone: http://*.hp.com O16 - DPF: Yahoo! Literati - http://download.games.yahoo.com/games/clients/y/tt0_x.cab O16 - DPF: {166B1BCA-3F9C-11CF-8075-444553540000} (Shockwave ActiveX Control) - http://download.macromedia.com/pub/shockwave/cabs/director/sw.cab O16 - DPF: {19E28AFC-EAE3-4CE5-AC83-2407B42F57C9} (MSSecurityAdvisor Class) - http://download.microsoft.com/download/0/5/c/05c905f4-dd30-427d-a3de-373c3e5552fc/msSecAdv.cab?1068595544957 O16 - DPF: {30528230-99F7-4BB4-88D8-FA1D4F56A2AB} (YInstStarter Class) - http://download.yahoo.com/dl/installs/yinst.cab O16 - DPF: {3295909D-35BF-40EF-9464-341FDD66CD1E} (Siebel Option Pack for IE 7.5.2) - https://crm.ultimatix.net/sales/16084/applets/SiebelOptionPack.cab O16 - DPF: {3E68E405-C6DE-49FF-83AE-41EE9F4C36CE} (Office Update Installation Engine) - http://office.microsoft.com/officeupdate/content/opuc.cab O16 - DPF: {4524F6B8-B807-11D5-B6C8-00805F77B630} (Signer Control) - https://www.ultimatix.net/certEXE/Signer.cab O16 - DPF: {555500CD-CB54-11D6-8DB9-0000864598B3} (Diagmgr Class) - http://isupport4.hp.com/awebui/jsp/answerweb/applets/HPISDiagManager.CAB O16 - DPF: {556DDE35-E955-11D0-A707-000000521957} - http://www.xblock.com/download/xclean_micro.exe O16 - DPF: {597C45C2-2D39-11D5-8D53-0050048383FE} (OPUCatalog Class) - http://office.microsoft.com/productupdates/content/opuc.cab O16 - DPF: {631F0C94-C02F-40AC-A31B-DDC39731FC81} (Siebel Option Pack for IE 7.0.4) - https://crm.ultimatix.net/sales/14165/applets/SiebelOptionPack.cab O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - http://a840.g.akamai.net/7/840/537/d052c1d7d32ead/housecall.antivirus.com/housecall/xscan53.cab O16 - DPF: {78960E0E-0B0C-11D4-8997-00104BD12D94} (AV Class) - http://www.pcpitstop.com/antivirus/PCPAV.CAB O16 - DPF: {80DD2229-B8E4-4C77-B72F-F22972D723EA} (AvxScanOnline Control) - http://www.bitdefender.com/scan/Msie/bitdefender.cab O16 - DPF: {8714912E-380D-11D5-B8AA-00D0B78F3D48} (Yahoo! Webcam Upload Wrapper) - http://chat.yahoo.com/cab/yuplapp.cab O16 - DPF: {9A95FE4A-0CD3-4698-A0F4-D2264C6E7046} (HPActiveChat Class) - http://isupport4.hp.com/awebui/jsp/answerweb/applets/ISPEActiveChat.CAB O16 - DPF: {9b935470-ad4a-11d5-b63e-00c04faedb18} (Oracle JInitiator 1.1.8.16) - O16 - DPF: {B10CBD8D-F9B6-11CF-9B38-0080AD11B667} (Ikonic Button Control) - http://activex.microsoft.com/activex/controls/iptdweb/ikcntrls.cab O16 - DPF: {B7506610-E888-11D1-8479-006097B16769} (BillingCalendarVer2.Calendar) - https://contracts.ultimatix.net/OCXCONTROLS/Cab.Cab O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab O16 - DPF: {FC3A74E5-F281-4F10-AE1E-733078684F3C} (Downloader Class) - http://www.2020search.com/toolbar/2020Search.cab

I have a clue ... but can you tell me if it shuts off right when the scan starts or a little after. I think it's a heating problem ... thermal sensors on intel switch off if temperature is too high .. now what would carry laptop temp up, a scan of course ... increased processor usage i have an evo n 1000v and it always goes up about 7 degress during scan. Download motherboard monitor and test it .. or for a quick test get aida32 and go to the Computer > sensor section it should detect your thermal sensors and give you the temp ... search www.google.com for software don't have exact link now.

Good guess, Hylian. However, these last couple of days, the laptop has started switching off on cold starts, within a couple of minutes of booting. In fact, I could send out this response only after a couple of attempts. I did try out Aida32 (www.aida32.hu) but it does not give me any information when I try Computer>>sensor. Either it does not support HP Pavilion or my motherboard sensors are not functional. Are there any other similar tools which I can try out ? Btw, I've installed all the latest security patches from Microsoft and my NAV 2002 has the latest updates. Incidentially, my NAV 2002 Auto-Protect is enabled but it remains disabled for the first 5 minutes after booting. Is this significant ? BCM

Well if i were you i'd get it into the manufacturer and let them have a look at it. It could be a lot of different problems ranging from power supply , processor , graphics cards .. .you really need to run proper diagnostics on it ... you could well be screwing it up on every boot. If there is no known problem and fix of this sort on the specific laptop then take it into manufacturer ...