I have been running build 7100 x86 for a while now. This morning it started announcing "access denied" to both my hard drives and all their partitions. I had not made any changes to settings of any kind recently nor installed any hardware or software recently. The only account on the PC is set up as an administrator. I have tried changing security settings so I could take ownership and grant myself permission, but "access denied" I have tried the same from the command line, but "access denied." I cannot execute the Dos Prompt as administrator (despite being an administrator) because "access denied." I have tried disabling UAC, but the system just blinks and does nothing. I have tried logging in as Admin or Administrator, but there seems to be no way to do this. I have tried reinstalling Windows from scratch, but "access denied." In setup the drives display their volume names (I think) and correct sizes, but incorrectly display zero free space. From explorer within Win 7, the drives do not display their volume names and show no free space. I have lost access to more than half of all my work product (I have a second PC that is not experiencing problems of this sort). This is completely unacceptable and infuriating. In smaller ways, this has always been a problem, the issue of denials due insufficient authority. I am the sole owner of my hardware and the sole user. There is no reason I should ever be wrestling for authority. I really need help. I have Googled and tried several things, but none of them work in my situation. Have I just lost my data? Is there anyway around this?