CTHelper.exe is installed with creative labs devices, it kinda helps 3rd party developers make plugins and such that are used on the hardware, its NOT essential and you SHOULD be able to end it, unless its being started as a service, you can try opening msconfig on the run line, and remove any instances of it from the startup tab, hoping without it there your issues will be gone, if it refuses to go away with just taking the check out of that entry, there is another way, if its a service, but it involves messing with the registry, try the ms config thing and post back and we'll take it from there