I had at first Nero 8's older version which ran fine on win 7. Then I heard of Nero-18.104.22.168a_all_update and downloaded it. to my immense surprise after installing it 1.5 GB or so disappeared from my C drive!! I investigated and found that NERO had stored a temp file there with lots of RAR files and installer and whatnot...I deleted those. Nero starts ok , but what was that with the 1.5 GB?? And I also see that Nero Filter Check has automatically disappeared from start-up.