Hi, Recently installed Win 7 and tried using my floppy drive for first time and had some problems with it. After verifying the drive and data cable was working OK using my XP box and Win 7 telling me I had the correct drivers for the drive and the controller I decided to try the flpydisk.sys file from XP to see if that would make a difference. When trying to us the Device Manager to update the driver for the drive using the older file from XP Device Manger would not allow me to do it telling me I had the latest driver. I then decided to try doing it manually. When trying to move the flpydisk.sys file, in Win 7, to the desktop I was told I would have to get permission from TrustedInstaller. Having no idea who TrustedInstaller was I decided to just take ownership of the file, I only have one user and it's setup as administrator, which worked to allow me to move the file and try the XP file which helped some but didn't fully correct the problems I was having. I then put the original file back and attempted to change the ownership back to TrustedInstaller. Windows then told me, in so many words, TrustedInstaller was an invalid name. I sure would appreciate if anyone can clue me in on who the TrustedInstaller is and why Win 7 won't allow me to put it back. Thanks for any info.