How serious is this??

Below this message is my latest hijack this scan,

How serious is this?? and could it have come through ICQ messenger?

I sent a message via ICQ messenger and WHAM!!! I was immediately cut off from all internet access.
It lasted for two hours then came back.

I ran a virus scan and these came up:

C:\backup-20040415-040349-380.dll - TrojanDownloader:Win32/VB.BN -> Infected
C:\Documents and Settings\NEW MIKES\Local Settings\Temporary Internet Files\Content.IE5\DRBO2WH7\icq_help.tripod[2]->(SCRIPT0014) - JS/Loding.B* -> Infected
C:\RECYCLER\S-1-5-21-889127505-756921068-3962847104-1009\Dc149.cab->biprep.exe - TrojanSpy/Win32.BiSpy.A -> Infected
C:\RECYCLER\S-1-5-21-889127505-756921068-3962847104-1009\Dc150.exe - TrojanSpy/Win32.BiSpy.A -> Infected
C:\RECYCLER\S-1-5-21-889127505-756921068-3962847104-1009\Dc189.exe - Win32/HLLW.Nachi.B.dam#2 -> Infected
++++++++++++++++++++++++++++++++++++++++++
hijackthis scan log:
Logfile of HijackThis v1.97.7
Scan saved at 4:54:59 AM, on 4/20/2004
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:\WINDOWS\System32\drivers\CDAC11BA.EXE
C:\WINDOWS\system32\slserv.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\McAfee\McAfee VirusScan\Avsynmgr.exe
C:\Program Files\McAfee\McAfee VirusScan\VsStat.exe
C:\Program Files\McAfee\McAfee VirusScan\AvConsol.exe
C:\Program Files\McAfee\McAfee VirusScan\Vshwin32.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\mHotkey.exe
C:\Program Files\Verizon Online\Visual IP InSight\IPClient.exe
C:\Program Files\Verizon Online\Visual IP InSight\IPMon32.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\Common Files\Microsoft Shared\Works Shared\WkUFind.exe
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\McAfee\McAfee VirusScan\alogserv.exe
C:\Program Files\McAfee\McAfee Shared Components\Guardian\CMGrdian.exe
C:\PROGRA~1\Yahoo!\MESSEN~1\ypager.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\MSN Messenger\msnmsgr.exe
C:\Program Files\Microsoft Office\Office\FINDFAST.EXE
C:\Program Files\Microsoft Office\Office\OSA.EXE
C:\Program Files\Common Files\Network Associates\McShield\Mcshield.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Documents and Settings\NEW MIKES\Desktop\NOTEPAD.EXE
C:\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.yahoo.com/
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://red.clientapps.yahoo.com/customize/ie/defaults/stp/ymsgr*http://my.yahoo.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = http://red.clientapps.yahoo.com/cus.../*http://www.yahoo.com/ext/search/search.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.emachines.com
O2 - BHO: (no name) - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {243B17DE-77C7-46BF-B94B-0B5F309A0E64} - C:\Program Files\Microsoft Money\System\mnyside.dll
O2 - BHO: (no name) - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar2.dll
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\googletoolbar2.dll
O4 - HKLM\..\Run: [CHotkey] mHotkey.exe
O4 - HKLM\..\Run: [IPInSightLAN 01] "C:\Program Files\Verizon Online\Visual IP InSight\IPClient.exe" -l
O4 - HKLM\..\Run: [IPInSightMonitor 01] "C:\Program Files\Verizon Online\Visual IP InSight\IPMon32.exe"
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [Microsoft Works Update Detection] C:\Program Files\Common Files\Microsoft Shared\Works Shared\WkUFind.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [Alogserv] C:\Program Files\McAfee\McAfee VirusScan\alogserv.exe
O4 - HKLM\..\Run: [McAfee Guardian] "C:\Program Files\McAfee\McAfee Shared Components\Guardian\CMGrdian.exe" /SU
O4 - HKCU\..\Run: [Yahoo! Pager] C:\PROGRA~1\Yahoo!\MESSEN~1\ypager.exe -quiet
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\MSN Messenger\msnmsgr.exe" /background
O4 - Global Startup: Microsoft Find Fast.lnk = C:\Program Files\Microsoft Office\Office\FINDFAST.EXE
O4 - Global Startup: Office Startup.lnk = C:\Program Files\Microsoft Office\Office\OSA.EXE
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: Cac&hed Snapshot of Page - res://C:\Program Files\Google\GoogleToolbar1.dll/cmcache.html
O8 - Extra context menu item: Si&milar 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: Control Pad (HKLM)
O9 - Extra 'Tools' menuitem: Control Pad (HKLM)
O9 - Extra button: Messenger (HKLM)
O9 - Extra 'Tools' menuitem: Yahoo! Messenger (HKLM)
O9 - Extra button: ICQ Pro (HKLM)
O9 - Extra 'Tools' menuitem: ICQ (HKLM)
O9 - Extra button: Related (HKLM)
O9 - Extra 'Tools' menuitem: Show &Related Links (HKLM)
O9 - Extra button: MoneySide (HKLM)
O9 - Extra button: @C:\Program Files\Messenger\Msgslang.dll,-61144 (HKLM)
O9 - Extra 'Tools' menuitem: @C:\Program Files\Messenger\Msgslang.dll,-61144 (HKLM)
O12 - Plugin for .spop: C:\Program Files\Internet Explorer\Plugins\NPDocBox.dll
O14 - IERESET.INF: START_PAGE_URL=http://www.emachines.com
O16 - DPF: ChatSpace Full Java Client 3.1.0.229 - http://surechat.com:9000/Java/cfs31229.cab
O16 - DPF: ChatSpace Full Java Client 4.0.0.301 - http://63.102.226.240:8000/Java/cfs40301.cab
O16 - DPF: ConferenceRoom Java Client - http://216.152.65.174:8000/java/cr.cab
O16 - DPF: Yahoo! Chat - http://us.chat1.yimg.com/us.yimg.com/i/chat/applet/c381/chat.cab
O16 - DPF: {02BF25D5-8C17-4B23-BC80-D3488ABDDC6B} (QuickTime Object) - http://www.apple.com/qtactivex/qtplugin.cab
O16 - DPF: {11260943-421B-11D0-8EAC-0000C07D88CF} (iPIX ActiveX Control) - http://www.ipix.com/viewers/ipixx.cab
O16 - DPF: {166B1BCA-3F9C-11CF-8075-444553540000} (Shockwave ActiveX Control) - http://download.macromedia.com/pub/shockwave/cabs/director/sw.cab
O16 - DPF: {30528230-99F7-4BB4-88D8-FA1D4F56A2AB} (YInstStarter Class) - http://download.yahoo.com/dl/installs/yinst0401.cab
O16 - DPF: {5D9E4B6D-CD17-4D85-99D4-6A52B394EC3B} (WSDownloader Control) - http://www.webshots.com/samplers/WSDownloader.ocx
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - http://a840.g.akamai.net/7/840/537/2004033001/housecall.antivirus.com/housecall/xscan53.cab
O16 - DPF: {74F5614A-8A8C-43B4-8CC2-4B4EFAF4A6C5} (TSCCInstall Class) - http://www.techsmith.com/codec/tsccinst.cab
O16 - DPF: {7B297BFD-85E4-4092-B2AF-16A91B2EA103} (WScanCtl Class) - http://www3.ca.com/virusinfo/webscan.cab
O16 - DPF: {9A54032D-31F7-400D-B184-83B33BDE65FA} (MSN File Upload Control) - http://sc.groups.msn.com/controls/FileUC/MsnUpld.cab
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://www.pandasoftware.com/activescan/as5/asinst.cab
O16 - DPF: {A3009861-330C-4E10-822B-39D16EC8829D} (CRAVOnline Object) - http://www.ravantivirus.com/scan/ravonline.cab
O16 - DPF: {A8658086-E6AC-4957-BC8E-7D54A7E8A78D} (DoomCln Object) - http://www.microsoft.com/security/controls/DoomCln.CAB
O16 - DPF: {BAC01377-73DD-4796-854D-2A8997E3D68A} (Yahoo! Photos Easy Upload Tool Class) - http://us.dl1.yimg.com/download.yahoo.com/dl/installs/ydropper/ydropper1_1us.cab
O16 - DPF: {C3DFA998-A486-11D4-AA25-00C04F72DAEB} (MSN Photo Upload Tool) - http://sc.groups.msn.com/controls/PhotoUC/MsnPUpld.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab
O16 - DPF: {EF791A6B-FC12-4C68-99EF-FB9E207A39E6} (McFreeScan Class) - http://download.mcafee.com/molbin/iss-loc/vso/en-us/tools/mcfscan/1,5,0,4346/mcfscan.cab
O16 - DPF: {F04A8AE2-A59D-11D2-8792-00C04F8EF29D} (Hotmail Attachments Control) - http://by8fd.bay8.hotmail.msn.com/activex/HMAtchmt.ocx
O16 - DPF: {F58E1CEF-A068-4C15-BA5E-587CAF3EE8C6} (MSN Chat Control 4.5) - http://chat.msn.com/bin/msnchat45.cab