I've got an older Toshiba laptop, running windows 98. For the last six months it's gotten slower and more unreliable. Here is a HJT log.
Logfile of HijackThis v1.99.1
Scan saved at 11

44 AM, on 5/2/05
Platform: Windows 98 Gold (Win9x 4.10.1998)
MSIE: Internet Explorer v4.72 SP1 (4.72.3110.0000)
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\THOTKEY.EXE
C:\PROGRAM FILES\ENCOMPASS\ENCMONTR.EXE
C:\PROGRAM FILES\NORTON ANTIVIRUS\RTVSCN95.EXE
C:\PROGRAM FILES\NORTON ANTIVIRUS\DEFWATCH.EXE
C:\WINDOWS\SYSTEM\KB891711\KB891711.EXE
C:\WINDOWS\SYSTEM\MSTASK.EXE
C:\WINDOWS\SYSTEM\LEXBCES.EXE
C:\WINDOWS\SYSTEM\RPCSS.EXE
C:\WINDOWS\SYSTEM\mmtask.tsk
C:\WINDOWS\TASKMON.EXE
C:\WINDOWS\SYSTEM\SYSTRAY.EXE
C:\WINDOWS\SYSTEM\IRMON.EXE
C:\WINDOWS\SYSTEM\TFUNCKEY.EXE
C:\WINDOWS\SYSTEM\TPWRMGR.EXE
C:\WINDOWS\SYSTEM\TOSHIBSU.EXE
C:\PROGRAM FILES\MICROSOFT HARDWARE\MOUSE\POINT32.EXE
C:\PROGRAM FILES\NORTON ANTIVIRUS\VPTRAY.EXE
C:\PROGRAM FILES\COMMON FILES\REAL\UPDATE_OB\REALSCHED.EXE
C:\WINDOWS\RunDLL.exe
C:\PROGRAM FILES\SPYWARE DOCTOR\SWDOCTOR.EXE
C:\PROGRAM FILES\OPENOFFICE.ORG1.1.4\PROGRAM\SOFFICE.EXE
C:\PROGRAM FILES\MOZILLA FIREFOX\FIREFOX.EXE
C:\WINDOWS\EXPLORER.EXE
C:\PROGRAM FILES\HIJACK THIS\HIJACKTHIS.EXE
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\PROGRAM FILES\ADOBE\ACROBAT 5.0\READER\ACTIVEX\ACROIEHELPER.OCX
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: PCTools Site Guard - {5C8B2A36-3DB1-42A4-A3CB-D426709BBFEB} - C:\PROGRA~1\SPYWAR~1\TOOLS\IESDSG.DLL
O2 - BHO: PCTools Browser Monitor - {B56A7D7D-6927-48C8-A975-17DF180C71AC} - C:\PROGRA~1\SPYWAR~1\TOOLS\IESDPB.DLL
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\SYSTEM\MSDXM.OCX
O4 - HKLM\..\Run: [ScanRegistry] C:\WINDOWS\scanregw.exe /autorun
O4 - HKLM\..\Run: [TaskMonitor] C:\WINDOWS\taskmon.exe
O4 - HKLM\..\Run: [SystemTray] SysTray.Exe
O4 - HKLM\..\Run: [IrMon] IrMon.exe
O4 - HKLM\..\Run: [TFunckey] TFunckey.Exe
O4 - HKLM\..\Run: [TPwrMgr] TPwrMgr.Exe
O4 - HKLM\..\Run: [TDspOff] TDspOff.Exe B
O4 - HKLM\..\Run: [TOSHIBSU] TOSHIBSU.EXE
O4 - HKLM\..\Run: [POINTER] point32.exe
O4 - HKLM\..\Run: [mdac_runonce] C:\WINDOWS\SYSTEM\runonce.exe
O4 - HKLM\..\Run: [Norton Auto-Protect] (value not set)
O4 - HKLM\..\Run: [NAV DefAlert] (value not set)
O4 - HKLM\..\Run: [vptray] C:\Program Files\Norton AntiVirus\vptray.exe
O4 - HKLM\..\Run: [LexStart] lexstart.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [autoupdate] rundll32 C:\WINDOWS\SYSTEM\WINUP2DATE.DLL,SHStart
O4 - HKLM\..\Run: [KavSvc] C:\WINDOWS\irmirk.exe
O4 - HKLM\..\Run: [LoadPowerProfile] Rundll32.exe powrprof.dll,LoadCurrentPwrScheme
O4 - HKLM\..\RunServices: [THotkey] THotkey.Exe
O4 - HKLM\..\RunServices: [Encompass_ENCMONTR] C:\Program Files\Encompass\ENCMONTR.EXE
O4 - HKLM\..\RunServices: [rtvscn95] C:\Program Files\Norton AntiVirus\rtvscn95.exe
O4 - HKLM\..\RunServices: [defwatch] C:\Program Files\Norton AntiVirus\defwatch.exe
O4 - HKLM\..\RunServices: [KB891711] C:\WINDOWS\SYSTEM\KB891711\KB891711.EXE
O4 - HKLM\..\RunServices: [LoadPowerProfile] Rundll32.exe powrprof.dll,LoadCurrentPwrScheme
O4 - HKLM\..\RunServices: [SchedulingAgent] C:\WINDOWS\SYSTEM\mstask.exe
O4 - HKCU\..\Run: [Taskbar Display Controls] RunDLL deskcp16.dll,QUICKRES_RUNDLLENTRY
O4 - HKCU\..\Run: [Spyware Doctor] "C:\PROGRAM FILES\SPYWARE DOCTOR\SWDOCTOR.EXE" /Q
O4 - Startup: rdpr.exe
O4 - Startup: OpenOffice.org 1.1.4.lnk = ?
O9 - Extra button: Spyware Doctor - {2D663D1A-8670-49D9-A1A5-4C56B4E14E84} - C:\PROGRA~1\SPYWAR~1\TOOLS\IESDPB.DLL
O11 - Options group: [TB] Toolbar