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Rerun HJT,and put a checkmark beside these :-

O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: (no name) - {8F3FA829-7D77-4AAC-9B33-767556E58136} - C:\Windows\system32\byXNgFxW.dll
O4 - HKLM\..\Run: [MSServer] rundll32.exe C:\Windows\system32\pmnoLbxW.dll,#1
O4 - HKLM\..\Run: [BMb1323777] Rundll32.exe "C:\Windows\system32\yqublddm.dll",s
O4 - HKLM\..\Run: [b20104eb] rundll32.exe "C:\Windows\system32\exnhmnwd.dll",b
O23 - Service: @%SystemRoot%\ehome\ehstart.dll,-101 (ehstart) - Unknown owner - %windir%\system32\svchost.exe (file missing)
O23 - Service: LiveUpdate Notice Service Ex (LiveUpdate Notice Ex) - Unknown owner - C:\Program Files\Common Files\Symantec Shared\ccSvcHst.exe" /h ccCommon (file missing)
O23 - Service: LiveUpdate Notice Service - Unknown owner - C:\Program Files\Common Files\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PIFSvc.exe" /m "C:\Program Files\Common Files\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PifEng.dll (file missing)
O23 - Service: @%SystemRoot%\system32\qwave.dll,-1 (QWAVE) - Unknown owner - %windir%\system32\svchost.exe (file missing)
O23 - Service: @%SystemRoot%\system32\seclogon.dll,-7001 (seclogon) - Unknown owner - %windir%\system32\svchost.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - %ProgramFiles%\Windows Media Player\wmpnetwk.exe (file missing)

now close all windows and browsers and click FIX CHECKED

Then i need you to delete your version of hijackthis and get the latest version from here :-

http://www.trendsecure.com/portal/en-US/threat_analytics/HJTInstall.exe

when you install it , you will find HJT in C:\program files\trend micro

then :-

Please download ComboFix from Here or Here to your Desktop.

**Note: In the event you already have Combofix, this is a new version that I need you to download. It is important that it is saved directly to your desktop**

Please, never rename Combofix unless instructed.
Close any open browsers.
Close/disable all anti virus and anti malware programs so they do not interfere with the running of ComboFix.
- Very Important! Temporarily disable your anti-virus, script blocking and any anti-malware real-time protection before performing a scan. They can interfere with ComboFix or remove some of its embedded files which may cause "unpredictable results".
- Click on this link to see a list of programs that should be disabled. The list is not all inclusive. If yours is not listed and you don't know how to disable it, please ask.
- Close any open browsers.
- WARNING: Combofix will disconnect your machine from the Internet as soon as it starts
- Please do not attempt to re-connect your machine back to the Internet until Combofix has completely finished.
- If there is no internet connection after running Combofix, then restart your computer to restore back your connection.
Double click on combofix.exe & follow the prompts.
When finished, it will produce a report for you.
Please post the "C:\ComboFix.txt" along with a new HijackThis log for further review.

**Note: Do not mouseclick combofix's window while it's running. That may cause it to stall**