no ping,browse by name,hijack log

internet connection ok but port scanner and browsing with ip numbers crashes while security task manager dows not notice anything suspicious
nor did nod32 (but with 4 months old definitions)
hijack log
windows 98 se
running processes:
C:\WINDOWS\SYSTEM\KERNEL32.DLL
C:\WINDOWS\SYSTEM\MSGSRV32.EXE
C:\WINDOWS\SYSTEM\MPREXE.EXE
C:\WINDOWS\EXPLORER.EXE
C:\WINDOWS\SYSTEM\INTERNAT.EXE
C:\WINDOWS\SYSTEM\SYSTRAY.EXE
C:\PROGRAM FILES\MICROSOFT OFFICE\OFFICE\OSA.EXE
C:\WINDOWS\SYSTEM\WINOA386.MOD
E:\BOOTCD\WINTOOLS\AUTORUN.EXE
C:\WINDOWS\TEMP\HIJACK.EXE
C:\431IDES\HIJACK.EXE

O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\PROGRAM FILES\ADOBE\ACROBAT 5.0\READER\ACTIVEX\ACROIEHELPER.OCX (file missing)
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: [internat.exe] internat.exe
O4 - HKLM\..\Run: [SystemTray] SysTray.Exe
O4 - HKLM\..\Run: [LoadPowerProfile] Rundll32.exe powrprof.dll,LoadCurrentPwrScheme
O4 - HKLM\..\RunServices: [LoadPowerProfile] Rundll32.exe powrprof.dll,LoadCurrentPwrScheme
O4 - Startup: Office Startup.lnk = C:\Program Files\Microsoft Office\Office\OSA.EXE
O4 - Startup: PowerReg Scheduler.exe
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O12 - Plugin for .spop: C:\PROGRA~1\INTERN~1\Plugins\NPDocBox.dll
?
how common are win98 rootkits and what tool for dos registry editor?