My old computer was an Acer BRAND and the motherboard I believe crapped out on me so I RECENTLY bought a new HP Pavillion desktop and installed my acer hard drive onto the hp and I was able to see my drives. My problem is that my old files on the drive will not work anymore when I try to use them. I have a bunch of pictures, music and video files that some I cannot replace and I was able to get by the security permissions for the files but when I try to view the pictures I am told that I don't have permission to access the FILE location and when I try to view a video or listen to a song the windows media player it tells me the file cannot be accessed and that it may be in use. I am using the Vista Premium Os that came with the computer. I have searched for solutions and have come up empty. My last resort is to get my acer computer back operational with a new motherboard and move the files to a external drive and see if I can transport them to my new computer before installing the old hard drive. The acer was originally a vista os but I had it removed for xp and I am unsure if that is what the problem is that I have a hard drive that used xp and still has it in its memory and it cant CONVERT them. I need any help I can getHow to Take OWNERSHIP of Files