Check your hosts file for a start; it should look something like this unless you have added sites..... this is mine, an it's the default:-
# Copyright (c) 1993-1999 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host
127.0.0.1 localhost
_______________________________________________
..to see this go c:\windows\system32\drivers\etc. Open a notepad and drag hosts from the right pane into it. If there are entries below the localhost one that you do not recognise or did not put there, then you need to reset the hosts file.
=Please download Hoster:
http://www.funkytoad.com/download/hoster.zip and extract it to your Desktop.
=Click the Restore MS Hosts Button and then click OK and exit Hoster.
==Download this temp file cleaner from
http://www.atribune.org/ccount/click.php?id=1 --click in the download window to run it, and when ATF Cleaner opens go Select all, and then Empty Selected.
Next click Firefox [if you have that browser..] at the top, Select All again, and Empty Selected again. Follow that procedure also if you have Opera.
Close ATF.
==GET AVG antispyware 7.5 here..
http://free.grisoft.com/doc/5390/lng/us/tpl/v5 -the link is almost at the bottom of the page , avgas 7.5.0.50. Install it and UPDATE it.
Start AVG a-s 7.5; under Scanner/ Settings set Recommended actions to Quarantine, and run the scan. Save the log file and only then click Apply all actions. Post the log file.
Unsolved 
My Name)(My Roommate's Name)AdminestratorSomehow, someone hacked into my computer with a new admin account {I do have the default Admin account in Safe Mode, though.} So I assumed my settings MUST have been messed with. Sure enough!These are my computer's current problems:~ (Almost) NO Internet Access. Right now I'm on FastFreeProxy, desperately trying to fix my computer. For some reason I can access obscure sites that I never go to. However, the sites that I go on a daily basis load to a blank page with "Invalid syntax error" as a header.~ I can't downloading ANYTHING. I tried to download FireFox but instead I received this message-:"Your current security settings do not allow this file to be downloaded."Not only that but when I tried downloading FireFox off of LimeWire and opened .exe, I was blocked from even opening it! So I can use AIM/Limewire (which saved my life, btw.)Anyway, my HiJackThis:Logfile of HijackThis v1.99.1Scan saved at 00:47, on 07-04-19Platform: Windows XP SP2 (WinNT 5.01.2600)MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)Running processes:C:\WINDOWS\System32\smss.exeC:\WINDOWS\system32\winlogon.exeC:\WINDOWS\system32\services.exeC:\WINDOWS\system32\lsass.exeC:\WINDOWS\system32\svchost.exeC:\WINDOWS\System32\svchost.exeC:\WINDOWS\system32\spoolsv.exeC:\WINDOWS\Explorer.EXEC:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exeC:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exeC:\WINDOWS\csrss.exeC:\Program Files\AIM\aim.exeC:\Program Files\Internet Explorer\IEXPLORE.EXEC:\Program Files\HJT\HijackThis.exeR0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://cyborgsmoke.angelfire.com/O4 - HKCU\..\Run: [AIM] C:\Program Files\AIM\aim.exe -cnetwait.odlO9 - Extra button: AIM - {AC9E2541-2814-11d5-BC6D-00B0D0A1DE45} - C:\Program Files\AIM\aim.exeO23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exeO23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exeO23 - Service: HP WMI Interface (hpqwmi) - Hewlett-Packard Development Company, L.P. - C:\Program Files\HPQ\SHARED\HPQWMI.exeO23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exeO23 - Service: Sony SPTI Service (SPTISRV) - Sony Corporation - C:\Program Files\Common Files\Sony Shared\AVLib\Sptisrv.exe 
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