freezes; also blocks Spybot

Help!
Computer is freezing periodically with no warning. No consistency as to why (i.e., this occurs randomly not with any specific task).
Also, something is precluding my ability to "block bad products" in Spybot S&D. I can block most, but continue to get a pesky message that '4 additional bad products' need to be blocked. Antivir scans come up clean.

Would appreciate someone reviewing my HJT log, which follows. and avise as to what to get rid of:

Logfile of HijackThis v1.99.1
Scan saved at 3:54:04 PM, on 10/29/05
Platform: Windows 98 SE (Win9x 4.10.2222A)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINDOWS\SYSTEM\KERNEL32.DLL
C:\WINDOWS\SYSTEM\MSGSRV32.EXE
C:\WINDOWS\SYSTEM\SPOOL32.EXE
C:\WINDOWS\SYSTEM\MPREXE.EXE
C:\WINDOWS\SYSTEM\MDM.EXE
C:\WINDOWS\SYSTEM\MSTASK.EXE
C:\PROGRAM FILES\EXECUTIVE SOFTWARE\DISKEEPERLITE\DKSERVICE.EXE
C:\WINDOWS\SYSTEM\mmtask.tsk
C:\WINDOWS\EXPLORER.EXE
C:\WINDOWS\TASKMON.EXE
C:\WINDOWS\SYSTEM\SYSTRAY.EXE
C:\PROGRAM FILES\PICASA\PICASAMEDIADETECTOR.EXE
C:\WINDOWS\MIXER.EXE
C:\WINDOWS\SYSTEM\QTTASK.EXE
C:\PROGRAM FILES\AVPERSONAL\AVGCTRL.EXE
C:\WINDOWS\SYSTEM\HPZTSB09.EXE
C:\PROGRAM FILES\HEWLETT-PACKARD\HP SOFTWARE UPDATE\HPWUSCHD.EXE
C:\PROGRAM FILES\AVPERSONAL\AVSCHED32.EXE
C:\WINDOWS\SYSTEM\DDHELP.EXE
C:\WINDOWS\SYSTEM\WMIEXE.EXE
C:\HJT\HIJACKTHIS.EXE

R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
N3 - Netscape 7: user_pref("browser.startup.homepage", "http://start.earthlink.net/"); (C:\WINDOWS\Application Data\Mozilla\Profiles\default\93sj79yd.slt\prefs.js)
N3 - Netscape 7: user_pref("browser.search.defaultengine", "engine://C%3A%5CPROGRAM%20FILES%5CNETSCAPE%5CNETSCAPE%5Csearchplugins%5CSBWeb_02.src"); (C:\WINDOWS\Application Data\Mozilla\Profiles\default\93sj79yd.slt\prefs.js)
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHELPER.DLL
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\PROGRAM FILES\ADOBE\ACROBAT 6.0\READER\ACTIVEX\ACROIEHELPER.DLL
O2 - BHO: SpywareGuard Download Protection - {4A368E80-174F-4872-96B5-0B27DDD11DB2} - C:\PROGRAM FILES\SPYWAREGUARD\DLPROTECT.DLL
O2 - BHO: Starware - {CA356D79-679B-4b4c-8E49-5AF97014F4C1} - C:\PROGRAM FILES\STARWARE\BIN\STARWARE.DLL
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\SYSTEM\MSDXM.OCX
O3 - Toolbar: &Yahoo! Companion - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\PROGRAM FILES\YAHOO!\COMPANION\INSTALLS\CPN\YCOMP5_5_7_0.DLL
O3 - Toolbar: Starware - {D49E9D35-254C-4c6a-9D17-95018D228FF5} - C:\PROGRAM FILES\STARWARE\BIN\STARWARE.DLL
O4 - HKLM\..\Run: [TaskMonitor] c:\windows\taskmon.exe
O4 - HKLM\..\Run: [SystemTray] SysTray.Exe
O4 - HKLM\..\Run: [CriticalUpdate] c:\windows\SYSTEM\wucrtupd.exe -startup
O4 - HKLM\..\Run: [LifeScape Media Detector] C:\Program Files\Picasa\PicasaMediaDetector.exe
O4 - HKLM\..\Run: [C-Media Mixer] Mixer.exe /startup
O4 - HKLM\..\Run: [QuickTime Task] "C:\WINDOWS\SYSTEM\QTTASK.EXE" -atboottime
O4 - HKLM\..\Run: [AVGCtrl] C:\PROGRAM FILES\AVPERSONAL\AVGCTRL.EXE /min
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\SYSTEM\hpztsb09.exe
O4 - HKLM\..\Run: [HP Software Update] "C:\Program Files\Hewlett-Packard\HP Software Update\HPWuSchd.exe"
O4 - HKLM\..\Run: [AVSCHED32] C:\PROGRAM FILES\AVPERSONAL\AVSCHED32.EXE /min
O4 - HKLM\..\RunServices: [Machine Debug Manager] C:\WINDOWS\SYSTEM\MDM.EXE
O4 - HKLM\..\RunServices: [SchedulingAgent] mstask.exe
O4 - HKLM\..\RunServices: [DkService] C:\Program Files\Executive Software\DiskeeperLite\DkService.exe
O4 - Startup: SpywareGuard.lnk.disabled
O4 - Startup: America Online Tray Icon.lnk = C:\Program Files\America Online 8.0\aoltray.exe
O4 - Startup: Microsoft Office.lnk.disabled
O4 - Startup: ScanDisk.lnk = C:\WINDOWS\SCANDSKW.EXE
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\SYSTEM\Shdocvw.dll
O9 - Extra button: AIM - {AC9E2541-2814-11d5-BC6D-00B0D0A1DE45} - C:\AOL INSTANT MESSENGER\AIM95_C0\AIM95_C0\AIM.EXE
O9 - Extra button: Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\PROGRAM FILES\YAHOO!\MESSENGER\YHEXBMES0521.DLL
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\PROGRAM FILES\YAHOO!\MESSENGER\YHEXBMES0521.DLL
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_02\bin\npjpi150_02.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_02\bin\npjpi150_02.dll
O16 - DPF: {C2FCEF52-ACE9-11D3-BEBD-00105AA9B6AE} (Symantec RuFSI Registry Information Class) - http://security1.norton.com/SSC/SharedCont…c/bin/cabsa.cab
O16 - DPF: {E77C0D62-882A-456F-AD8F-7C6C9569B8C7} (ActiveDataObj Class) - https://www-secure.symantec.com/techsupp/ac…/ActiveData.cab
O16 - DPF: {1239CC52-59EF-4DFA-8C61-90FFA846DF7E} (Musicnotes Viewer) - http://netscape.musicnotes.com/download/mnviewer.cab
O16 - DPF: {CE28D5D2-60CF-4C7D-9FE8-0F47A3308078} (ActiveDataInfo Class) - http://www.symantec.com/techsupp/activedata/SymAData.dll
O16 - DPF: Yahoo! Chat - http://us.chat1.yimg.com/us.yimg.com/i/cha…t/c381/chat.cab
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - http://a840.g.akamai.net/7/840/537/2004061…all/xscan53.cab
O16 - DPF: ChatSpace Full Java Client 3.1.0.229 - http://64.55.105.205/Java/cfs31229.cab
O16 - DPF: {EB623776-492A-42CA-9571-3AA39F58530B} - http://www.alwaysupdatednews.com/install/aun_0011.exe
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://www.pandasoftware.com/activescan/as5/asinst.cab
O16 - DPF: {A3009861-330C-4E10-822B-39D16EC8829D} (CRAVOnline Object) - http://www.ravantivirus.com/scan/ravonline.cab
O16 - DPF: {FE0BD779-44EE-4A4B-AA2E-743C63F2E5E6} (IWinAmpActiveX Class) - http://pdl.stream.aol.com/downloads/aol/unagi/ampx_en_dl.cab
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Thank you!