From adaware forum In case you don't have HijackThis...

* Download Trend Micro Hijack This™

Doubleclick the HJTInstall.exe to start it.

By default it will install HijackThis in the Program Files\Trendmicro folder and create a desktop shortcut.

HijackThis will open after install. Press the Scan button below.

Then in HijackThis, look if one of the following is present and check it in HijackThis:

(the CLSIDs {********-****-****-****-************} may be different in your case, but the filename is always the same)

O2 - BHO: BetaDivX - {48BF2BC0-2945-11D8-8CAC-00080FC65465} - C:\WINDOWS\system32\IR9V0_QCX.dll

O2 - BHO: BetaDivX - {D99BACC6-6289-4D4F-8BAF-4192016AF547} - C:\Windows\System32\bDivX.dll

O2 - BHO: IntelVideoCodec - {33A12BEB-3219-4CA8-99B4-733192704C62} - C:\WINDOWS\system32\IntelVideoDivX.dll

O2 - BHO: IntelVideoCodec - {04F7FAC5-F506-4F29-9094-9CB9144B192C} - C:\WINDOWS\system32\IntelVideo.dll

O2 - BHO: IntelVideoCodec - {AF36E90A-44CA-4EE3-B578-C07383623217} - C:\Windows\System32\Video32.dll

O2 - BHO: RealMedia - {87B570FB-D2CF-4D3C-8E1B-E1E7018BBA95} - C:\WINDOWS\system32\dx50codec.dll

O2 - BHO: RealMedia - {0EEDB911-C5FA-486F-8334-57288578C627} - C:\WINDOWS\system32\XunLeiBHO_Now.dll

O2 - BHO: 3GP - {5D67E2E7-0C2B-4491-87C4-37F2AC6033D2} - C:\WINDOWS\system32\a3gpcodec.dll

O2 - BHO: AlphaDivX - {3B236BEE-8200-421D-919D-CA17D5739D8F} - C:\WINDOWS\system32\aDivX.dll

O2 - BHO: Mp3 Video - {D4FD35A3-101C-4FAA-A9CA-E8C9461C3CEF} - C:\WINDOWS\system32\mp3avi.dll

O2 - BHO: Mp3 Video - {2B659BB5-3E85-4BC6-BAFC-98FEDFF3AE99} - C:\WINDOWS\system32\VideoMP3.dll

O2 - BHO: Video On-line - {741403DD-46A4-4D58-8FA7-427335C3BBF6} - C:\WINDOWS\system32\PowerVideo.dll

O2 - BHO: Video DivX 3.12 - {09D72564-27E2-4F12-8AB6-03F83E4567DE} - C:\WINDOWS\system32\sysdivx.dll

O2 - BHO: System DivX4 - {2FA3B736-1AC7-454D-8E94-8BA8158BF064} - C:\WINDOWS\system32\sysvideo32.dll

O2 - BHO: Video - {15FEB658-AACC-412E-BC13-D54CFD74A8F6} - C:\WINDOWS\stream32a.dll

O2 - BHO: Video - {D0995F82-90C7-4C78-9B4C-C1700FB8B120} - C:\WINDOWS\windivx.dll

Click the "Fix checked" button below.

Then reboot your computer.

After reboot, navigate to and delete one of the following file if still present (related with the entry you fixed in HijackThis):

C:\WINDOWS\system32\IR9V0_QCX.dll

C:\Windows\System32\bDivX.dll

C:\WINDOWS\system32\IntelVideoDivX.dll

C:\WINDOWS\system32\IntelVideo.dll

C:\Windows\System32\Video32.dll

C:\WINDOWS\system32\XunLeiBHO_Now.dll

C:\WINDOWS\system32\dx50codec.dll

C:\WINDOWS\system32\a3gpcodec.dll

C:\WINDOWS\system32\aDivX.dll

C:\WINDOWS\system32\mp3avi.dll

C:\WINDOWS\system32\VideoMP3.dll

C:\WINDOWS\system32\PowerVideo.dll

C:\WINDOWS\system32\sysdivx.dll

C:\WINDOWS\system32\sysvideo32.dll

C:\WINDOWS\stream32a.dll

C:\WINDOWS\windivx.dll

Also look if the following files are present and delete them:

C:\Windows\System32\bDivX.dll.bak

C:\WINDOWS\system32\IR9V0_QCX.dll.bak

C:\WINDOWS\system32\IntelVideo.dll.bak

C:\WINDOWS\system32\IntelVideoDivX.dll.bak

C:\Windows\System32\Video32.dll.bak

C:\WINDOWS\system32\XunLeiBHO_Now.dll.bak

C:\WINDOWS\system32\dx50codec.dll.bak

C:\WINDOWS\system32\a3gpcodec.dll.bak

C:\WINDOWS\system32\aDivX.dll.bak

C:\WINDOWS\system32\mp3avi.dll.bak

C:\WINDOWS\system32\sysdivx.dll.bak

C:\WINDOWS\system32\VideoMP3.dll.bak

C:\WINDOWS\system32\PowerVideo.dll.bak

C:\WINDOWS\system32\sysvideo32.dll.bak

C:\WINDOWS\stream32a.dll.bak

C:\WINDOWS\windivx.dll.bak

Normally, by default, if you fix that entry in Hijackthis and your Internet Explorer is closed while fixing in HijackThis, HijackThis will already delete that file as well. So don't worry if you can't find the file afterwards anymore - HijackThis already deleted it. But it's always a good idea to doublecheck.

Please make sure you don't delete "similar looking" files as they may be legitimate.

In case when you're in doubt or it didn't solve your problem, please start a NEW thread in the HijackThisforum with your HijackThislog.

FYI... Ad-Aware removes this pest as well. So make sure you have the latest updates.

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