Hi.
I have run Ad-Aware and SpyBot cleaned up then re-booted. (Old definitions - I keep getting corrupted file messages attempting to download new definitions). I use a hardware firewall on a LAN set up with fairly tight firewall rules. My computer seems to be using a lot of resources, it crashes a lot (including blue screen), sometimes freezes when using IE and reboots unexpectedly, also sometimes refuses to shut down without brute-force manual power-off. HijackThis log attached, thanks for looking:

Logfile of HijackThis v1.99.1
Scan saved at 4:56:23 PM, on 13/10/2006
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:\WINNT\System32\svchost.exe
C:\PROGRA~1\MICROS~4\MSSQL\binn\sqlservr.exe
C:\WINNT\system32\MSTask.exe
C:\WINNT\System32\snmp.exe
C:\WINNT\system32\stisvc.exe
C:\Program Files\Apache Software Foundation\Tomcat 5.5\bin\tomcat5.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\Explorer.EXE
C:\WINNT\system32\MDM.EXE
C:\PROGRA~1\TEXTBR~1.0\Bin\INSTAN~1.EXE
C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\Program Files\CyberLink DVD Solution\PowerDVD\PDVDServ.exe
C:\WINNT\system32\spool\DRIVERS\W32X86\3\E_FATI9CP.EXE
C:\PROGRA~1\Adaptec\DirectCD\directcd.exe
C:\Program Files\Adobe\Acrobat 7.0\Distillr\Acrotray.exe
C:\Program Files\Apache Software Foundation\Tomcat 5.5\bin\tomcat5w.exe
C:\WINNT\system32\ctfmon.exe
C:\Program Files\Adobe\Acrobat 7.0\Acrobat\acrobat_sl.exe
C:\Program Files\Apache Group\Apache2\bin\ApacheMonitor.exe
C:\Program Files\WinZip\WZQKPICK.EXE
C:\Program Files\Microsoft SQL Server\80\Tools\Binn\sqlmangr.exe
D:\Software\HijakThis\HijackThis.exe

O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: Adobe PDF Conversion Toolbar Helper - {AE7CD045-E861-484f-8273-0445EE161910} - C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINNT\system32\msdxm.ocx
O3 - Toolbar: Adobe PDF - {47833539-D0C5-4125-9FA8-0819E2EAAC93} - C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [InstantAccess] C:\PROGRA~1\TEXTBR~1.0\Bin\INSTAN~1.EXE /h
O4 - HKLM\..\Run: [RegisterDropHandler] C:\PROGRA~1\TEXTBR~1.0\Bin\REGIST~1.EXE
O4 - HKLM\..\Run: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [RemoteControl] "C:\Program Files\CyberLink DVD Solution\PowerDVD\PDVDServ.exe"
O4 - HKLM\..\Run: [InCD] C:\Program Files\Ahead\InCD\InCD.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINNT\system32\NeroCheck.exe
O4 - HKLM\..\Run: [EPSON Stylus Photo RX430 Series] C:\WINNT\system32\spool\DRIVERS\W32X86\3\E_FATI9CP.EXE /P31 "EPSON Stylus Photo RX430 Series" /O6 "USB001" /M "Stylus Photo RX430"
O4 - HKLM\..\Run: [Adaptec DirectCD] C:\PROGRA~1\Adaptec\DirectCD\directcd.exe
O4 - HKLM\..\Run: [Acrobat Assistant 7.0] "C:\Program Files\Adobe\Acrobat 7.0\Distillr\Acrotray.exe"
O4 - HKLM\..\Run: [ApacheTomcatMonitor] "C:\Program Files\Apache Software Foundation\Tomcat 5.5\bin\tomcat5w.exe" //MS//Tomcat5
O4 - HKLM\..\RunServices: [RegisterDropHandler] C:\PROGRA~1\TEXTBR~1.0\Bin\REGIST~1.EXE
O4 - HKCU\..\Run: [ctfmon.exe] ctfmon.exe
O4 - HKCU\..\Run: [updateMgr] "C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AdobeUpdateManager.exe" AcStd7_0_7 -reboot 1
O4 - Startup: Service Manager.lnk = C:\Program Files\Microsoft SQL Server\80\Tools\Binn\sqlmangr.exe
O4 - Global Startup: Adobe Acrobat Speed Launcher.lnk = C:\Program Files\Adobe\Acrobat 7.0\Acrobat\acrobat_sl.exe
O4 - Global Startup: Adobe Gamma Loader.exe.lnk = C:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office\OSA9.EXE
O4 - Global Startup: Monitor Apache Servers.lnk = C:\Program Files\Apache Group\Apache2\bin\ApacheMonitor.exe
O4 - Global Startup: WinZip Quick Pick.lnk = C:\Program Files\WinZip\WZQKPICK.EXE
O8 - Extra context menu item: Convert link target to Adobe PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert link target to existing PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convert selected links to Adobe PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECaptureSelLinks.html
O8 - Extra context menu item: Convert selected links to existing PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppendSelLinks.html
O8 - Extra context menu item: Convert selection to Adobe PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert selection to existing PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convert to Adobe PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert to existing PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_02\bin\npjpi150_02.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_02\bin\npjpi150_02.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/…b?1128670452234
O17 - HKLM\System\CCS\Services\Tcpip\..\{86EE8C6C-0A95-4945-9C18-2C9D0EA43C46}: NameServer = 61.9.192.14,61.9.128.15
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: SearchList = bigpond.net.au
O17 - HKLM\System\CS2\Services\Tcpip\Parameters: SearchList = bigpond.net.au
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: SearchList = bigpond.net.au
O23 - Service: Adobe LM Service - Adobe Systems - C:\Program Files\Common Files\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: Logical Disk Manager Administrative Service (dmadmin) - VERITAS Software Corp. - C:\WINNT\System32\dmadmin.exe
O23 - Service: InCD Helper (InCDsrv) - Ahead Software AG - C:\Program Files\Ahead\InCD\InCDsrv.exe
O23 - Service: MySQL - Unknown owner - C:\Program.exe (file missing)
O23 - Service: Apache Tomcat (Tomcat5) - Unknown owner - C:\Program Files\Apache Software Foundation\Tomcat 5.5\bin\tomcat5.exe" //RS//Tomcat5 (file missing)