got through my firewall and created havoc

I received a warning from AntiVir software that a trojan had invaded C:\Windows\DPE.DLL. I chose the delete file option on the window prompt, but it would just reappear. It would not go away. I finially did a windows search and found 5 or 6 files with the same extension. After many attempts I was able to rid myself of the file. But I believe the DLL was a system file. What info can I supply to check?

The file DPE.DLL is not a system file as far as I'm aware. I think it is related to spyware problems. I'd suggest that you download HijackThis, run it from a folder on your hard drive (such as C:\HJK) and then copy the log for someone to check.

Logfile of HijackThis v1.98.0
Scan saved at 7:49:02 AM, on 7/31/2004
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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\spoolsv.exe
C:\Program Files\AVPersonal\AVGUARD.EXE
C:\PROGRA~1\COMMON~1\AOL\ACS\AOLacsd.exe
C:\Program Files\AVPersonal\AVWUPSRV.EXE
C:\WINDOWS\system32\cisvc.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\SYSTEM32\ZoneLabs\vsmon.exe
C:\WINDOWS\wanmpsvc.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\MUSICMATCH\MUSICMATCH Jukebox\mm_tray.exe
C:\Program Files\Common Files\Dell\EUSW\Support.exe
C:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe
C:\Program Files\Logitech\iTouch\iTouch.exe
C:\WINDOWS\System32\setnup.exe
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\Common Files\Microsoft Shared\Works Shared\WkUFind.exe
C:\Program Files\Picasa\PicasaMediaDetector.exe
C:\PROGRA~1\MOUSEW~1\SYSTEM\EM_EXEC.EXE
C:\WINDOWS\System32\DSentry.exe
C:\Program Files\AVPersonal\AVGNT.EXE
C:\Program Files\Common Files\AOL\ACS\AOLDial.exe
C:\PROGRA~1\COMMON~1\AOL\AOLSPY~1\AOLSP Scheduler.exe
C:\Program Files\Roxio\Easy CD Creator 5\DirectCD\DirectCD.exe
C:\Program Files\AVPersonal\AVSched32.EXE
C:\Program Files\Webroot\Washer\wwDisp.exe
C:\Program Files\America Online 9.0b\aoltray.exe
C:\Program Files\Digital Line Detect\DLG.exe
C:\Program Files\Logitech\iTouch\kbdtray.exe
C:\Program Files\Common Files\Microsoft Shared\Works Shared\wkcalrem.exe
C:\Program Files\America Online 9.0b\waol.exe
C:\Program Files\America Online 9.0b\shellmon.exe
C:\Program Files\Common Files\Aol\aoltpspd.exe
C:\WINDOWS\system32\cidaemon.exe
C:\WINDOWS\system32\cidaemon.exe
C:\Documents and Settings\Admin One\My Documents\My Pictures\HijackThis.exe

F2 - REG:system.ini: UserInit=C:\WINDOWS\System32\Userinit.exe
O3 - Toolbar: Yahoo! Companion - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\ycomp5_3_12_0.dll (file missing)
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O4 - HKLM\..\Run: [MMTray] C:\Program Files\MUSICMATCH\MUSICMATCH Jukebox\mm_tray.exe
O4 - HKLM\..\Run: [DwlClient] C:\Program Files\Common Files\Dell\EUSW\Support.exe
O4 - HKLM\..\Run: [sr1exe] "C:\Documents and Settings\All Users\Application Data\Dell\Alert\252\updtSup3.exe"
O4 - HKLM\..\Run: [Zone Labs Client] "C:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKLM\..\Run: [zBrowser Launcher] C:\Program Files\Logitech\iTouch\iTouch.exe
O4 - HKLM\..\Run: [TrojanScanner] C:\Program Files\Trojan Remover\Trjscan.exe
O4 - HKLM\..\Run: [Tray Temperature] C:\PROGRA~1\AWS\MiniBug.exe 1
O4 - HKLM\..\Run: [tbanskbuvx] C:\WINDOWS\System32\xtmksflu.exe
O4 - HKLM\..\Run: [SysTest] C:\WINDOWS\System32\systest.exe
O4 - HKLM\..\Run: [setnup.exe] C:\WINDOWS\System32\setnup.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [netsi32.exe] C:\WINDOWS\system32\netsi32.exe
O4 - HKLM\..\Run: [Microsoft Works Update Detection] C:\Program Files\Common Files\Microsoft Shared\Works Shared\WkUFind.exe
O4 - HKLM\..\Run: [LifeScape Media Detector] C:\Program Files\Picasa\PicasaMediaDetector.exe
O4 - HKLM\..\Run: [intdctrr] C:\WINDOWS\System32\idctup20.exe
O4 - HKLM\..\Run: [EM_EXEC] C:\PROGRA~1\MOUSEW~1\SYSTEM\EM_EXEC.EXE
O4 - HKLM\..\Run: [DVDSentry] C:\WINDOWS\System32\DSentry.exe
O4 - HKLM\..\Run: [AVGCtrl] C:\Program Files\AVPersonal\AVGNT.EXE /min
O4 - HKLM\..\Run: [ATIModeChange] Ati2mdxx.exe
O4 - HKLM\..\Run: [AOLDialer] C:\Program Files\Common Files\AOL\ACS\AOLDial.exe
O4 - HKLM\..\Run: [AOL Spyware Protection] "C:\PROGRA~1\COMMON~1\AOL\AOLSPY~1\AOLSP Scheduler.exe"
O4 - HKLM\..\Run: [AdaptecDirectCD] "C:\Program Files\Roxio\Easy CD Creator 5\DirectCD\DirectCD.exe"
O4 - HKLM\..\Run: [74189394.exe] C:\WINDOWS\System32\74189394.exe
O4 - HKLM\..\Run: [2LRX2W83X2T3MQ] C:\WINDOWS\System32\Tovs.exe
O4 - HKLM\..\Run: [AVSCHED32] C:\Program Files\AVPersonal\AVSched32.EXE /min
O4 - HKCU\..\Run: [Window Washer] C:\Program Files\Webroot\Washer\wwDisp.exe
O4 - Global Startup: America Online 9.0 Tray Icon.lnk = C:\Program Files\America Online 9.0b\aoltray.exe
O4 - Global Startup: Digital Line Detect.lnk = ?
O4 - Global Startup: Microsoft Works Calendar Reminders.lnk = ?
O8 - Extra context menu item: &AOL Toolbar search - res://C:\Program Files\AOL Toolbar\toolbar.dll/SEARCH.HTML
O8 - Extra context menu item: &Google Search - res://C:\Program Files\Google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: Backward Links - res://C:\Program Files\Google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: Cached Snapshot of Page - res://C:\Program Files\Google\GoogleToolbar1.dll/cmcache.html
O8 - Extra context menu item: Similar Pages - res://C:\Program Files\Google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Translate into English - res://C:\Program Files\Google\GoogleToolbar1.dll/cmtrans.html
O9 - Extra button: AOL Toolbar - {4982D40A-C53B-4615-B15B-B5B5E98D167C} - (no file)
O9 - Extra 'Tools' menuitem: AOL Toolbar - {4982D40A-C53B-4615-B15B-B5B5E98D167C} - (no file)
O9 - Extra button: Researcher - {9455301C-CF6B-11D3-A266-00C04F689C50} - C:\Program Files\Common Files\Microsoft Shared\Encarta Researcher\EROPROJ.DLL
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\System32\Shdocvw.dll
O9 - Extra button: MoneySide - {E023F504-0C5A-4750-A1E7-A9046DEA8A21} - C:\Program Files\Microsoft Money\System\mnyviewer.dll (file missing)
O17 - HKLM\System\CCS\Services\Tcpip\..\{1EE5F1AE-33CA-4A5A-A2F1-AEC3C5FC9787}: NameServer = 205.188.146.146
O17 - HKLM\System\CS1\Services\Tcpip\..\{1EE5F1AE-33CA-4A5A-A2F1-AEC3C5FC9787}: NameServer = 205.188.146.146
O18 - Protocol: msero - {B0D92A71-886B-453B-A649-1B91F93801E7} - C:\Program Files\Common Files\Microsoft Shared\Encarta Researcher\MSERO.DLL