"Error Reading SpywareGuard Definitions!"

Each time I load certain applications, I receive the following message:

"Error reading Spyware guard definitions. The file may be corrupt, or another program may have tampered with them.

Please help.

Logfile of HijackThis v1.98.0
Scan saved at 6:50:29 PM, on 7/13/2004
Platform: Windows 2000 SP4 (WinNT 5.00.2195)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:\WINNT\System32\smss.exe
C:\WINNT\system32\winlogon.exe
C:\WINNT\system32\services.exe
C:\WINNT\system32\lsass.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\system32\spoolsv.exe
C:\Program Files\Symantec_Client_Security\Symantec AntiVirus\DefWatch.exe
D:\Program Files\Executive Software\DiskeeperWorkstation\DKService.exe
C:\WINNT\System32\svchost.exe
C:\Program Files\Symantec_Client_Security\Symantec AntiVirus\Rtvscan.exe
C:\WINNT\system32\regsvc.exe
C:\WINNT\system32\MSTask.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\System32\mspmspsv.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\Explorer.EXE
C:\PROGRA~1\SYMANT~1\SYMANT~1\vptray.exe
D:\Program Files\Microsoft Office\Office\1033\OLFSNT40.EXE
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Documents and Settings\brian\My Documents\HijackThis.exe

F0 - system.ini: Shell=
F2 - REG:system.ini: UserInit=C:\WINNT\system32\userinit.exe,
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - d:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINNT\System32\msdxm.ocx
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [vptray] C:\PROGRA~1\SYMANT~1\SYMANT~1\vptray.exe
O4 - HKCU\..\Run: [AIM] C:\PROGRA~1\AIM\aim.exe -cnetwait.odl
O4 - HKCU\..\Run: [ClockSync] C:\PROGRA~1\CLOCKS~1\Sync.exe /q
O4 - Global Startup: Microsoft Office.lnk = D:\Program Files\Microsoft Office\Office\OSA9.EXE
O4 - Global Startup: Symantec Fax Starter Edition Port.lnk = D:\Program Files\Microsoft Office\Office\1033\OLFSNT40.EXE
O9 - Extra button: (no name) - {120E090D-9136-4b78-8258-F0B44B4BD2AC} - C:\WINNT\System32\ms.exe (file missing)
O9 - Extra 'Tools' menuitem: MaxSpeed - {120E090D-9136-4b78-8258-F0B44B4BD2AC} - C:\WINNT\System32\ms.exe (file missing)
O9 - Extra button: (no name) - {869EE607-5376-486d-8DAC-EDC8E239AD5F} - (no file)
O9 - Extra button: AIM - {AC9E2541-2814-11d5-BC6D-00B0D0A1DE45} - C:\PROGRA~1\AIM\aim.exe
O9 - Extra button: (no name) - {869EE607-5376-486d-8DAC-EDC8E239AD5F} - (no file) (HKCU)
O12 - Plugin for .spop: C:\Program Files\Internet Explorer\Plugins\NPDocBox.dll
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) - http://security.symantec.com/sscv6/SharedContent/vc/bin/AvSniff.cab
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/SharedContent/common/bin/cabsa.cab
O16 - DPF: {B942A249-D1E7-4C11-98AE-FCB76B08747F} (RealArcadeRdxIE Class) - http://games-dl.real.com/gameconsole/Bundler/CAB/RealArcadeRdxIE.cab
O21 - SSODL: System - {75F3D748-E0B7-42C4-8EDB-DF0FB30EB23A} - C:\WINNT\system32\system32.dll