Can you please do the following.

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Scan with HijackThis and then place a check next to all the following, if present:


O2 - BHO: (no name) - {96A261A1-66CD-417D-B860-BFA90222B14A} - C:\WINDOWS\system32\opnolLcb.dll (file missing)
O2 - BHO: (no name) - {FDD3B846-8D59-4ffb-8758-209B6AD74ACC} - (no file)

O20 - AppInit_DLLs: ajaiya.dll


Now, close all instances of Internet Explorer and any other windows you have open except HiJackThis, click "Fix checked".

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Locate and delete the following item(s), if present. Make sure you are able to view system and hidden files/ folders:

Search for...

ajaiya.dll

...using "Start | Search...".

-

Note that some of these file(s)/folder(s) may or may not be present. If present, and cannot be deleted because they're 'in use', try deleting them in Safe Mode by doing the following:
  • Restart your computer
  • After hearing your computer beep once during startup, but before the Windows icon appears, press F8.
  • Instead of Windows loading as normal, a menu should appear.
Select the first option to run Windows in Safe Mode hit enter.

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Download
SDFix
and save it to your desktop.

Please then reboot your computer in Safe Mode by doing the
following :
  • Restart your computer
  • After hearing your computer beep once during startup, but before the
    Windows icon appears, tap the F8 key continually;
  • Instead of Windows loading as normal, a menu with options should appear;
  • Select the first option, to run Windows in Safe Mode, then press "Enter".
  • Choose your usual account.
  • In Safe Mode, right click the SDFix.zip folder and choose Extract
    All    ,
  • Open the extracted folder and double click RunThis.bat to
    start the script.
  • Type Y to begin the script.
  • It will remove the Trojan Services then make some repairs to the
    registry and prompt you to press any key to Reboot.
  • Press any Key and it will restart the PC.
  • Your system will take longer that normal to restart as the fixtool
    will be running and removing files.
  • When the desktop loads the Fixtool will complete the removal and
    display Finished, then press any key to end the script and load
    your desktop icons.
  • Finally open the SDFix folder on your desktop and copy and paste the
    contents of the results file Report.txt

    Please post the SDFix log within CODE Tags.


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Please download ComboFix by sUBs from HERE or HERE
  • You must download it to and run it from your Desktop
  • Physically disconnect from the internet.
  • Now STOP all your monitoring programs (Antivirus/Antispyware, Guards and Shields) as they could easily interfere with ComboFix.
  • Double click combofix.exe & follow the prompts.
  • When finished, it will produce a log. Please save that log to post in your next reply along with a fresh HJT log
  • Re-enable all the programs that were disabled during the running of ComboFix..


Note:
Do not mouse-click combofix's window while it is running. That may cause it to stall.

CF disconnects your machine from the internet. The connection is automatically restored before CF completes its run. If CF runs into difficulty and terminates prematurely, the connection can be manually restored by restarting your machine.