Please immediate help important

You have a lot more problems than about:blank and the strain you have may not be repairable with About:Buster. But first you need to run ALL the stuff Abby direct you to in this link: < READ ME FIRST: Basic Spyware, Trojan And Virus Removal >

Again, make sure you do all the steps and the run these too:

http://www.ravantivirus.com/scan/
http://www.bitdefender.com/scan/licence.php
http://www.windowsecurity.com/trojanscan/

McAfee Avert Stinger: http://www.majorgeeks.com/download4063.html

Then tell us what all those steps from the link Abby gave and the ones I added found.
After that, post a new HijackThis log.

 

You did not answer what I asked:

"Then tell us what all those steps from the link Abby gave and the ones I added found."

You cannot be telling me that all of those scans found nothing. You even have a Sidefind Trojan (aka IST - Integrated Search Toobar) which I'm pretty sure Ad-aware normally at least complains about even if it cannot fix it.

You also have the Trojan.Mercurycas.A This is a Trojan horse that allows an infected computer to be used as an email relay. Don't you have a virus protection application on your PC? If not, you must install one. Try this one (it's free):

Avast! Home Edition: http://www.majorgeeks.com/download1968.html

So tell us exactly what you ran and the results for each one. In my next message, I will also give you some more things to do.

 

Since we may need to do some manual registry editing, download Erunt and use it to backup your registry: http://www.majorgeeks.com/download1267.html

Let me know when you get your registry backed up.

Also do the following (you should print or save this locally since you MUST be physically disconnected from the Internet later):

- Disable System Restore: http://forums.majorgeeks.com/showthread.php?t=31668
This will require a reboot. So reboot and then come back and continue these steps.

- download and run the file below. It will extract files to a folder c:\findnfix
http://downloads.subratam.org/FINDnFIX.exe

- Physically disconnect your network connection now! (unplug the cables)

- use Windows Explorer to get to the c:\findnfix directory and double click on !log!.bat and it will create a log.txt file (it will also pop up in notepad when done). Be patient, it takes a little while for it to scan thru all the files it needs to look for.

- When it is finished, reconnect your network connection and come back here and post as a text attachment the log.txt file from FINDnFIX
- Also post a new HJT log attachment.