Is "Twain tech" somehow related to yahoo messenger?

Twain-Tech adware is the Trojan.Win32.Keyhost.e

I suppose that you use XP and your drive letter is (C):


1- Use ADD/REMOVE in Control Panel to remove it.

In the absence of an entry in ADD/REMOVE PROGRAMS then do the following:

To permanently disable the software click Start/Run and then type
regsvr32 c:\windows\twaintec.dll

To completely remove the software: reboot in Safe Mode and then use Search and find and delete the file mxtarget.dll.

2- Unregister these dll files:
Click Start/Run and type:
regsvr32 c:\windows\system32\mxtarget.dll (then press OK)
regsvr32 c:\windows\system32\twaintec.dll (then press OK)
regsvr32 c:\windows\system\twaintec.dll (then press OK)
regsvr32 c:\windows\system\mxtarget.dll (then press OK)

Now reboot your PC

3- Remove these registry entries if they exist using regedit in Start\Run:

HKEY_CLASSES_ROOT\clsid\{000020dd-c72e-4113-af77-dd56626c6c42}

HKEY_CLASSES_ROOT\clsid\{0000607d-d204-42c7-8e46-216055bf9918}

HKEY_CLASSES_ROOT\software\microsoft\windows\currentversion\explorer\browser helper objects\{000020dd-c72e-4113-af77-dd56626c6c42}

HKEY_CLASSES_ROOT\software\microsoft\windows\currentversion\explorer\browser helper objects\{0000607d-d204-42c7-8e46-216055bf9918}

HKEY_LOCAL_MACHINE\clsid\{000020dd-c72e-4113-af77-dd56626c6c42}

HKEY_LOCAL_MACHINE\clsid\{0000607d-d204-42c7-8e46-216055bf9918}

HKEY_LOCAL_MACHINE\software\classes\clsid\{000020dd-c72e-4113-af77-dd56626c6c42}

HKEY_LOCAL_MACHINE\software\classes\clsid\{0000607d-d204-42c7-8e46-216055bf9918}

HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer\browser helper objects\{000020dd-c72e-4113-af77-dd56626c6c42}

HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer\browser helper objects\{0000607d-d204-42c7-8e46-216055bf9918}

Now reboot your PC
(Please backup your Registry before deleting any entry in case you commit an error: click Sart/Run and type regedit. click File/Export and then type a file name and click Save).

4- Search and remove these files if present:
c:\windows\system32\mxtarget.dll
c:\windows\system32\twaintec.dll
c:\windows\system\mxtarget.dll
c:\windows\system\twaintec.dll
c:\windows\twaintec.dll

Voilà!!!