Ok, i've been reading A LOT of forums and calling a lot of people, and asking the Geek Squad guys at my job (I work at BestBuy), and so far I have NOT been able to fix this problem.. Computer: Mobo: Asus M2N32-SLI DELUXE Processor: AMD Athlon 64 FX-62 RAM: 4Gig HD: 320 Gig Partitioned (C: Windows XP) (J: Windows 7) GPU: NVidia 9800 GTX+ Problem: About 3 months ago I was running into some security issues with 7. I was unable to transfer some files between my C: drive with XP on it. I was able to resolve this issue by going under the properties of the drive, security tab, then add permission. No other issues came up untill about a month ago. It completely denied me access to my C drive. Not only in Vista, but also when i reboot in XP I cannot access it. Some fixes: Used CMD prompt Net User Administrator /active:yes Gave complete permissions to Administrator and my other user (Scott) Gave complete permissions to Guest Have turned on ALL file sharing options Nothing is working. I can completely modify, access, adjust and delete anything from Vista to the C: drive. Once I reboot in XP i cannot do anything. I can only run programs. Every time i try to access the C drive i get the "Access Denied" error. I want to continue to use 7 But im getting VERY frustrated with it locking me out of everything. Can someone please help me?