Do a HijackThis scan & place a check next to these items and select "Fix checked":
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = :0
O4 - HKLM\..\Run: [SDSS] wscript //B C:\WINDOWS\system32\SDSSEnv.vbs
O4 - HKLM\..\Run: [mexeq] "C:\Program Files\Windows Media Player\mexeq22011.exe"
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\j2re1.4.2_03\bin\npjpi142_03.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\j2re1.4.2_03\bin\npjpi142_03.dll
O9 - Extra button: (no name) - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - (no file)
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe (file missing)
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe (file missing)
O15 - Trusted Zone: *.shutterstock.com
Ignore any prompts for a reboot
---------------
1. Download this file -
http://download.bleepingcomputer.com...a/ComboFix.exe
* IMPORTANT !!! Place combofix.exe on your Desktop
2. Go to

→ Run →
paste in the single line command & click OK
"%userprofile%\desktop\combofix.exe" /killall
3. When finished, it shall produce a log for you. Post that log & a fresh HJT log in your next reply
Note:
Do not mouseclick combofix's window whilst it's running. That may cause it to stall
__________________
Question - what have you done for the community today?