I have written NT service... After it is installed (NT4 WS, admin login) it causes errors every time it tries to read (same with write) some data from/to system registry. Other than that it works as expected but registry is the pain. Furthermore it writes the data to the root of the HKLM dispite the key I am trying to operate at... Seems I missing something obvious am I?? Like permissions etc. Any info will be appreciated. Thanks in advance!