Hello all. Thank you in advance for all of the help you provide us "technically challenged." I am having the same type of problem as many other users: When I try to start and run regedit or taskmgr it says its already in use by another program My ctrl+alt+delete is disabled. I notice a program is always running in the background called dllhost.exe. I also noticed that this application is embedded in a Start Menu for all user on my computer. I am not able to delete this as is says it is in use. I have already tried to use the removal process and cleaning software listed in a sticky at the top of this board. I thought it would solve everything but I am still having the same problems. Any help is greatly appreciated.