Browser Hijacked....Help

I hope this is where I ask for help.....apparently, my browser has been hijacked by some popup ad program.....Everytime I open a new page, bam! ads.....and my pop up blocker doesnt stop them......They appear to be from something called xlime (maybe) and offeroptimizer. It also slows my entire system down......I downloaded Hijack This and here is my log file.....someone please help! I'd be forever grateful

Logfile of HijackThis v1.97.7
Scan saved at 5:33:48 PM, on 5/3/04
Platform: Windows 98 Gold (Win9x 4.10.1998)
MSIE: Internet Explorer v5.50 (5.50.4134.0600)

Running processes:
C:\WINDOWS\SYSTEM\KERNEL32.DLL
C:\WINDOWS\SYSTEM\MSGSRV32.EXE
C:\WINDOWS\SYSTEM\MPREXE.EXE
C:\WINDOWS\SYSTEM\ZONELABS\VSMON.EXE
C:\WINDOWS\SYSTEM\mmtask.tsk
C:\WINDOWS\EXPLORER.EXE
C:\WINDOWS\SYSTEM\SYSTRAY.EXE
C:\PROGRAM FILES\ENIGMA SOFTWARE GROUP\SPYHUNTER\POPUPBLOCKER\ENIGMAPOPUPSTOP.EXE
C:\PROGRAM FILES\ZONE LABS\ZONEALARM\ZLCLIENT.EXE
C:\WINDOWS\SYSTEM\SPOOL32.EXE
C:\WINDOWS\SYSTEM\DDHELP.EXE
C:\UNZIPPED\HIJACKTHIS\HIJACKTHIS.EXE

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://search.presario.net/scripts/redirec...&s=search&i=enu
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = http://search.presario.net/scripts/redirec...&s=search&i=enu
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer provided by America Online
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://search.presario.net/scripts/redirec...&query=%s&i=enu
R3 - URLSearchHook: PerfectNavBHO Class - {0428FFC7-1931-45b7-95CB-3CBB919777E1} - C:\PROGRA~1\PERFEC~1\BHO\PERFEC~1.DLL
O2 - BHO: NavErrRedir Class - {0428FFC7-1931-45b7-95CB-3CBB919777E1} - C:\PROGRA~1\PERFEC~1\BHO\PERFEC~1.DLL
O2 - BHO: (no name) - {000020DD-C72E-4113-AF77-DD56626C6C42} - C:\WINDOWS\TWAINTEC.DLL
O3 - Toolbar: @msdxmLC.dll,-1@1033,&Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\SYSTEM\MSDXM.OCX
O4 - HKLM\..\Run: [SystemTray] SysTray.Exe
O4 - HKLM\..\Run: [EnigmaPopupStop] C:\Program Files\Enigma Software Group\SpyHunter\PopupBlocker\EnigmaPopupStop.exe
O4 - HKLM\..\Run: [Zone Labs Client] C:\PROGRA~1\ZONELA~1\ZONEAL~1\zlclient.exe
O4 - HKLM\..\RunServices: [TrueVector] C:\WINDOWS\SYSTEM\ZONELABS\VSMON.EXE -service
O9 - Extra button: Real.com (HKLM)
O14 - IERESET.INF: START_PAGE_URL=http://www.aol.com
O16 - DPF: Win32 Classes - file://c:\windows\Java\classes\win32ie4.cab
O16 - DPF: {1D6711C8-7154-40BB-8380-3DEA45B69CBF} (Web P2P Installer) -
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://download.macromedia.com/pub/shockwa...ash/swflash.cab
O16 - DPF: {166B1BCA-3F9C-11CF-8075-444553540000} (Shockwave ActiveX Control) - http://download.macromedia.com/pub/shockwa...director/sw.cab
O16 - DPF: {AB29A544-D6B4-4E36-A1F8-D3E34FC7B00A} (WTHoster Class) - http://install.wildtangent.com/bgn/partner...nds/install.cab
O16 - DPF: {205FF73B-CA67-11D5-99DD-444553540002} (CInstall Class) - http://www.wildtangent.com/webdrivers/webi...ave/Install.cab
O16 - DPF: {EF791A6B-FC12-4C68-99EF-FB9E207A39E6} (McFreeScan Class) - http://download.mcafee.com/molbin/iss-loc/...355/mcfscan.cab
O16 - DPF: Yahoo! Literati - http://download.games.yahoo.com/games/clients/y/tt2_x.cab