PC is a bit slow after installing Trend and IE7

Hello everyone. I'm a newbie to this site and this is my first post. Any help with this issue will be greatly appreciated.

My machine has been acting up ever since I installed Trend and IE7 on it. It's hard to tell if either of those programs is the cause of this since I installed them around the same time/day. I've already gone back to IE6 (which I hardly ever use anyways since I use Firefox now), but the lag is still there every now and then. It will take about four to five seconds to open up a simple tool like calculator. As I'm typing this, it seems to be fine when I open up another Firefox window, but like I said, it happens every now and then and it's not constant. Here's my HijackThis log:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 8:36:15 PM, on 4/1/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Trend Micro\Internet Security\SfCtlCom.exe
C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe
C:\WINDOWS\system32\MsPMSPSv.exe
C:\Program Files\Trend Micro\BM\TMBMSRV.exe
C:\PROGRA~1\TRENDM~1\INTERN~1\TmPfw.exe
C:\Program Files\Trend Micro\Internet Security\TmProxy.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\igfxtray.exe
C:\WINDOWS\system32\hkcmd.exe
C:\Program Files\Trend Micro\Internet Security\UfSeAgnt.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Trend Micro\TrendSecure\TSCFCommander.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Trend Micro\TrendSecure\TSCFPlatformCOMSvr.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe
C:\Program Files\Internet Explorer\iexplore.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: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar3.dll
O2 - BHO: TransactionProtector BHO - {C1656CCA-D2EA-4A32-94AE-AE0B180E6449} - C:\Program Files\Trend Micro\TrendSecure\TransactionProtector\TSToolbar.dll
O2 - BHO: e404 helper - {F10587E9-0E47-4CBE-84AE-7DD20B8685CC} - C:\Program Files\Helper\1201359958.dll (file missing)
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar3.dll
O3 - Toolbar: Transaction Protector - {E7620C98-FCCC-40E5-92EC-C7685D2E1E40} - C:\Program Files\Trend Micro\TrendSecure\TransactionProtector\TSToolbar.dll
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [UfSeAgnt.exe] "C:\Program Files\Trend Micro\Internet Security\UfSeAgnt.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O15 - Trusted Zone: http://www.msi.com.tw
O16 - DPF: {67DABFBF-D0AB-41FA-9C46-CC0F21721616} (DivXBrowserPlugin Object) - http://download.divx.com/player/DivXBrowserPlugin.cab
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://www.update.microsoft.com/mic...ls/en/x86/client/muweb_site.cab?1203140373656
O16 - DPF: {8167C273-DF59-4416-B647-C8BB2C7EE83E} (WebSDev Control) - http://liveupdate.msi.com.tw/autobios/LOnline/install.cab
O16 - DPF: {B7D07999-2ADB-4AEB-997E-F61CB7B2E2CD} (TSEasyInstallX Control) - http://www.trendsecure.com/easy_install/_activex/en-US/TSEasyInstallX.CAB
O22 - SharedTaskScheduler: esperantido - {67dc0736-075a-4647-95f5-d5421b838fed} - C:\WINDOWS\system32\svxmhpz.dll (file missing)
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: iPod Service - Apple Computer, Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Trend Micro Central Control Component (SfCtlCom) - Trend Micro Inc. - C:\Program Files\Trend Micro\Internet Security\SfCtlCom.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe
O23 - Service: Trend Micro Unauthorized Change Prevention Service (TMBMServer) - Trend Micro Inc. - C:\Program Files\Trend Micro\BM\TMBMSRV.exe
O23 - Service: Trend Micro Personal Firewall (TmPfw) - Trend Micro Inc. - C:\PROGRA~1\TRENDM~1\INTERN~1\TmPfw.exe
O23 - Service: Trend Micro Proxy Service (tmproxy) - Trend Micro Inc. - C:\Program Files\Trend Micro\Internet Security\TmProxy.exe

--
End of file - 4956 bytes

My machine is running:
MS Windows XP Pro Service Pack 2
Intel Pentium 4 CPU 2.00GHs and 752 of RAM

I don't know if I may be exaggerating, but I know my machine used to run a bit smoother and with less lag.

Thanks in advance... ;-)