Hello and welcome to Techspot.
You might want to copy and paste these instructions into a notepad file. Then you can have the file open in safe mode, so you can follow the instructions easier.
Boot into safe mode. See how HERE.
http://www.bleepingcomputer.com/forums/tutorial61.html
Turn off system restore.(XP/ME only) See how HERE.
http://www.bleepingcomputer.com/forums/tutorial56.html
In Windows Explorer, turn on "Show all files and folders, including hidden and system". See how HERE.
http://www.bleepingcomputer.com/forums/tutorial62.html
Run HJT with no other programmes open(except notepad).Click the scan button. Have HJT fix the following, by placing a tick in the little box next to(if there).
O1 - Hosts: 66.98.136.25 auto.search.msn.com
O1 - Hosts: 66.98.136.25 auto.search.msn.es
O1 - Hosts: 66.98.136.25 pagead2.googlesyndication.com
O2 - BHO: (no name) - {871A54C1-1EB3-48bd-A879-5DBA4EF16BE6} - C:\DOCUME~1\MIKECA~1\LOCALS~1\Temp\qvhdexfe.dll
Click on the fix checked button.
Close HJT.
Locate and delete the following
bold files and/or directories(if there).
C:\DOCUME~1\MIKECA~1\LOCALS~1\Temp\
qvhdexfe.dll
Reboot into normal mode and turn system restore back on.
Post a fresh HJT log as a .txt attachment into this thread. see
HERE for instructions.
I have moved your post to it`s own thread. This will save any confusion.
Regards Howard :wave: :wave: