hi all... 
I have quite a few problem with the web browsers in my system and I am not sure if they are related.. 
anyway, I ve listed them below...  help... 
1. I am not able to open any site through Firefox browser
2. when I open gmail on IE browser, it displays the login page but immediately shuts down, giving some error report
3. when I save some web page or download a pdf file onto my desktop, it does not get saved. I don't find it anywher on my desktop
this is my hijackthis log:
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 5:47:30 PM, on 11/15/2008
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\ZoneLabs\vsmon.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
C:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
C:\WINDOWS\system32\pctspk.exe
C:\WINDOWS\system32\svchost.exe
C:\Program 
Files\Google\GoogleToolbarNotifier\GoogleToolbarNo  tifier.exe
C:\WINDOWS\system32\wscntfy.exe
C:\PROGRA~1\Yahoo!\MESSEN~1\ymsgr_tray.exe
C:\Program Files\Google\Google Talk\googletalk.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start 
Page = about
:blank
R1 - HKLM\Software\Microsoft\Internet 
Explorer\Main,Default_Page_URL = 
MSN.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search 
Page = 
Live Search
R3 - URLSearchHook: Yahoo! Toolbar - 
{EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O2 - BHO: SSVHelper Class - 
{761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program 
Files\Java\jre1.5.0_09\bin\ssv.dll
O2 - BHO: Google Toolbar Helper - 
{AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program 
files\google\googletoolbar3.dll
O2 - BHO: Google Toolbar Notifier BHO - 
{AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program 
Files\Google\GoogleToolbarNotifier\2.0.301.7164\sw  g.dll
O3 - Toolbar: &Google - 
{2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program 
files\google\googletoolbar3.dll
O4 - HKCU\.. \Run: [swg] C:\Program 
Files\Google\GoogleToolbarNotifier\GoogleToolbarNo  tifier.exe
O4 - HKCU\.. \Run: [Yahoo! Pager] 
"C:\PROGRA~1\Yahoo!\MESSEN~1\YAHOOM~1.EXE" -quiet
O4 - HKUS\S-1-5-19\.. \Run: [AVG7_Run] 
C:\PROGRA~1\Grisoft\AVG7\avgw.exe /RUNONCE (User 
'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\.. \Run: [AVG7_Run] 
C:\PROGRA~1\Grisoft\AVG7\avgw.exe /RUNONCE (User 
'NETWORK SERVICE')
O4 - HKUS\S-1-5-18\.. \Run: [AVG7_Run] 
C:\PROGRA~1\Grisoft\AVG7\avgw.exe /RUNONCE (User 
'SYSTEM')
O4 - HKUS\.DEFAULT\.. \Run: [AVG7_Run] 
C:\PROGRA~1\Grisoft\AVG7\avgw.exe /RUNONCE (User 
'Default user')
O4 - Global Startup: DriveGuard.lnk = C:\Program 
Files\WinDriveGuard\DriveGuard.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - 
res://E:\MSOFFI~1\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - 
{08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program 
Files\Java\jre1.5.0_09\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - 
{08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program 
Files\Java\jre1.5.0_09\bin\ssv.dll
O9 - Extra button: Research - 
{92780B25-18CC-41C8-B9BE-3C9C571A8263} - 
E:\MSOFFI~1\OFFICE11\REFIEBAR.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
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} 
(YInstStarter Class) - C:\Program 
Files\Yahoo!\Common\yinsthelper.dll
O17 - 
HKLM\System\CCS\Services\Tcpip\.. \{6275C24D-E3A1-4909-A
40A-02671C6CAE23}: NameServer = 217.114.163.197
O17 - 
HKLM\System\CCS\Services\Tcpip\.. \{6CD6FE2B-FB9E-4903-8
B86-51739B67CD72}: NameServer = 85.255.113.123 
85.255.112.184
O17 - 
HKLM\System\CS1\Services\Tcpip\.. \{6275C24D-E3A1-4909-A
40A-02671C6CAE23}: NameServer = 217.114.163.197
O17 - 
HKLM\System\CS2\Services\Tcpip\.. \{6275C24D-E3A1-4909-A
40A-02671C6CAE23}: NameServer = 217.114.163.197
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - 
GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, 
s.r.o. - C:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
O23 - Service: Google Updater Service (gusvc) - Google - 
C:\Program Files\Google\Common\Google 
Updater\GoogleUpdaterService.exe
O23 - Service: PCTEL Speaker Phone (Pctspk) - PCtel, Inc. - 
C:\WINDOWS\system32\pctspk.exe
O23 - Service: SupportSoft RemoteAssist - SupportSoft, Inc. - 
C:\Program Files\Common Files\SupportSoft\bin\ssrc.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone 
Labs, LLC - C:\WINDOWS\system32\ZoneLabs\vsmon.exe
--
End of file - 4608 bytes
 suggest what to do... 
thank you