Homepage is changed to aboutblank and the ocraware warning shows on start-up.

Here's the log:

Logfile of HijackThis v1.97.7
Scan saved at 8:48:42 PM, on 7/29/04
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\MPREXE.EXE
C:\WINDOWS\SYSTEM\MSTASK.EXE
C:\PROGRAM FILES\NORTON CLEANSWEEP\CSINJECT.EXE
C:\PROGRAM FILES\NETWORK ASSOCIATES\MCAFEE VIRUSSCAN\VSHWIN32.EXE
C:\PROGRAM FILES\NETWORK ASSOCIATES\MCAFEE VIRUSSCAN\VSSTAT.EXE
C:\WINDOWS\SYSTEM\mmtask.tsk
C:\WINDOWS\EXPLORER.EXE
C:\WINDOWS\SYSTEM\RNAAPP.EXE
C:\WINDOWS\SYSTEM\TAPISRV.EXE
C:\WINDOWS\TASKMON.EXE
C:\WINDOWS\SYSTEM\SYSTRAY.EXE
C:\MOUSE\SYSTEM\EM_EXEC.EXE
C:\PROGRAM FILES\NETWORK ASSOCIATES\MCAFEE VIRUSSCAN\AVCONSOL.EXE
C:\PROGRAM FILES\ACD SYSTEMS\ACDSEE\CAMDETECT.EXE
C:\PROGRAM FILES\HP OFFICEJET SERIES 700\BIN\HPOSTR03.EXE
C:\PROGRAM FILES\ADOBE\ACROBAT 4.0\DISTILLR\ACROTRAY.EXE
C:\PROGRAM FILES\NORTON CLEANSWEEP\CSINSM32.EXE
C:\WINDOWS\SYSTEM\WMIEXE.EXE
C:\PROGRAM FILES\HP OFFICEJET SERIES 700\BIN\HPOVDX03.EXE
C:\Program Files\Norton CleanSweep\Monwow.exe
C:\PROGRAM FILES\INTERNET EXPLORER\IEXPLORE.EXE
C:\WINDOWS\SYSTEM\DDHELP.EXE
C:\WINDOWS\SYSTEM\PSTORES.EXE
C:\MY DOCUMENTS\HijackTHIS.EXE

R1 - HKCU\Software\Microsoft\Internet Explorer,SearchURL = http://sharempeg.com/find/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = file://c:\windows\TEMP\sp.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = file://c:\windows\TEMP\sp.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://reduce.to/searchstart
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = file://c:\windows\TEMP\sp.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = file://c:\windows\TEMP\sp.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = file://c:\windows\TEMP\sp.html
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = file://c:\windows\TEMP\sp.html
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,HomeOldSP = about:blank
F1 - win.ini: load=C:\OPLIMIT\OCRAWARE.EXE
O2 - BHO: (no name) - {5440A280-E0C9-11D8-901C-444594E9A591} - C:\WINDOWS\SYSTEM\DICKPC.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: [EM_EXEC] c:\mouse\system\em_exec.exe
O4 - HKLM\..\Run: [LoadPowerProfile] Rundll32.exe powrprof.dll,LoadCurrentPwrScheme
O4 - HKLM\..\Run: [VsecomrEXE] C:\Program Files\Network Associates\McAfee VirusScan\VSEcomR.EXE
O4 - HKLM\..\Run: [AvconsoleEXE] C:\Program Files\Network Associates\McAfee VirusScan\avconsol.exe /minimize
O4 - HKLM\..\Run: [VsStatEXE] C:\Program Files\Network Associates\McAfee VirusScan\VSSTAT.EXE /SHOWWARNING
O4 - HKLM\..\Run: [QAGENT] C:\QUICKENW\QAGENT.EXE
O4 - HKLM\..\Run: [Vshwin32EXE] C:\PROGRAM FILES\NETWORK ASSOCIATES\MCAFEE VIRUSSCAN\VSHWIN32.EXE
O4 - HKLM\..\Run: [Camera Detector] C:\PROGRA~1\ACDSYS~1\ACDSEE\CAMDET~1.EXE
O4 - HKLM\..\RunServices: [LoadPowerProfile] Rundll32.exe powrprof.dll,LoadCurrentPwrScheme
O4 - HKLM\..\RunServices: [SchedulingAgent] mstask.exe
O4 - HKLM\..\RunServices: [McAfeeWebScanX] C:\PROGRAM FILES\NETWORK ASSOCIATES\MCAFEE VIRUSSCAN\WebScanX.Exe /RUNSERVICES
O4 - HKLM\..\RunServices: [CSINJECT.EXE] C:\Program Files\Norton CleanSweep\CSINJECT.EXE
O4 - HKLM\..\RunServices: [Vshwin32EXE] C:\PROGRAM FILES\NETWORK ASSOCIATES\MCAFEE VIRUSSCAN\VSHWIN32.EXE
O4 - Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office\OSA9.EXE
O4 - Startup: HP OfficeJet Series 700 StartUp.lnk = C:\Program Files\HP OfficeJet Series 700\bin\HPOstr03.exe
O4 - Startup: Acrobat Assistant.lnk = C:\Program Files\Adobe\Acrobat 4.0\Distillr\AcroTray.exe
O4 - Startup: CleanSweep Smart Sweep-Internet Sweep.lnk = C:\Program Files\Norton CleanSweep\csinsm32.exe
O9 - Extra button: Messenger (HKLM)
O9 - Extra 'Tools' menuitem: Yahoo! Messenger (HKLM)
O9 - Extra button: Dell Home (HKCU)
O12 - Plugin for .mov: C:\PROGRA~1\INTERN~1\PLUGINS\npqtplugin.dll
O12 - Plugin for .mpeg: C:\PROGRA~1\INTERN~1\PLUGINS\npqtplugin3.dll
O16 - DPF: {A45F39DC-3608-4237-8F0E-139F1BC49464} - http://www.greatplugin.com/diallerfiles/016144.exe
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab
O16 - DPF: {9600F64D-755F-11D4-A47F-0001023E6D5A} (Shutterfly Picture Upload Plugin) - http://web1.shutterfly.com/downloads/Uploader.cab
O16 - DPF: {9F1C11AA-197B-4942-BA54-47A8489BB47F} (Update Class) - http://v4.windowsupdate.microsoft.com/CAB/x86/ansi/iuctl.CAB?38031.5314236111
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - http://a840.g.akamai.net/7/840/537/2004061001/housecall.trendmicro.com/housecall/xscan53.cab
O16 - DPF: {C3DFA998-A486-11D4-AA25-00C04F72DAEB} (MSN Photo Upload Tool) - http://sc.groups.msn.com/controls/PhotoUC/MsnPUpld.cab
O16 - DPF: {80DD2229-B8E4-4C77-B72F-F22972D723EA} (AvxScanOnline Control) - http://www.bitdefender.com/scan/Msie/bitdefender.cab

Thanks for your help !