security warning popups

i did a virus and spyware check and cleaned and fixed errors but still these windows keep popping up incessantly sometimes every second. my popup blockers stops them each time but its very hard to do my work, typing, surfing etc. when its closing windows left and right.

these annoying warnings ask if i want to install macromedia flash player.

Logfile of HijackThis v1.99.0
Scan saved at 3:16:18 PM, on 2/9/05
Platform: Windows 98 Gold (Win9x 4.10.1998)
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:\PROGRAM FILES\MCAFEE\MCAFEE VIRUSSCAN\AVSYNMGR.EXE
C:\PROGRAM FILES\MCAFEE\MCAFEE UTILITIES\STARTM.EXE
C:\PROGRAM FILES\MOUSEAWAY\MOUSEAWAY.EXE
C:\WINDOWS\SYSTEM\DDHELP.EXE
C:\WINDOWS\EXPLORER.EXE
C:\PROGRAM FILES\GREENBROWSER 2.3\GREENBROWSER.EXE
C:\PROGRAM FILES\CLICKOFF\CLICKOFF.EXE
C:\PROGRAM FILES\FREE DOWNLOAD MANAGER\FDM.EXE
C:\PROGRAM FILES\AEDIT\AEDIT32.EXE
C:\PROGRAM FILES\HIJACK\HIJACKTHIS.EXE

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\SYSTEM\MSDXM.OCX
O4 - Startup: WinKey.lnk = C:\Program Files\WinKey\WinKey.exe
O8 - Extra context menu item: For&msAgent - A:\\agent.html
O8 - Extra context menu item: Download by Free Download Manager - file://C:\Program Files\Free Download Manager\dllink.htm
O8 - Extra context menu item: Download web site by Free Download Manager - file://C:\Program Files\Free Download Manager\dlpage.htm
O8 - Extra context menu item: Download all by Free Download Manager - file://C:\Program Files\Free Download Manager\dlall.htm
O8 - Extra context menu item: Download selected by Free Download Manager - file://C:\Program Files\Free Download Manager\dlselected.htm
O9 - Extra button: (no name) - {AFC3FA82-AD07-45cd-8B57-983435B9899E} - (no file)
O16 - DPF: Win32 Classes - file://c:\windows\Java\classes\win32ie4.cab
O16 - DPF: {0E5F0222-96B9-11D3-8997-00104BD12D94} (PCPitstop Utility) - http://www.pcpitstop.com/pcpitstop/PCPitStop.CAB
O16 - DPF: {9732FB42-C321-11D1-836F-00A0C993F125} (mhLabel Class) - http://www.pcpitstop.com/mhLbl.cab