Ok, you need to get rid of stcloader.exe, AdTools and msmc.exe.
KPTZIF.exe, EKPWNH.exe and iakk.exe aren't ringing any bells though. I'll talk to a mate about them and see if they know anything about them.
Anyway, to get rid of stcloader, go to
http://www.2nd-thought.com/uninstall.html, run that. Go into your Registry Editor ('regedit' in the Run menu) and delete the following keys if you can see them.
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run\adstartup
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run\bokja
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run\sqinstaller
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run\stcloader
Reboot the system then go Start -> Run again, then msconfig, select the Startup tab, disable any of these processes.
addestroyer.exe
addestroyerinner.exe
automove.exe
bokja.exe
csaolldr.exe
csv5p070.exe
loader[1].exe
slmss.exe
spedia.exe
sq_3394_3222.exesqinstaller.exe
stc.exe
stc[1].exe
stcloader.exe
trans.exe
randreco.exe
You'll need to uninstall some DLLs as well, to do that, go to the Start menu, then Run, then type 'cmd', then type 'regsvr32 -u ????.dll', in place of the ????, put the names of the following DLLs.
2ndsrch.dll
a_clearsearch.dll
cdsm32.dll
csaolinst.dll
csbiinst.dll
csie.dll
csieinst.dll
idleui.dll
spextdll.dll
swrt01.dll
swin32.dll
voiceip.dll
Then see if you can delete these directories if you have them.
%commonprograms%\addestroyer
Program Files\addestroyer
Program Files\clearsearch
Program Files\common files\slmss
Program Files\second thought
Program Files\stc
That should solve your STC problem, I'll get to the others after a rest, I'm crook as a dog and this took a bit out of me.