Hi, i have 2 computers, my desktop running W7 build 7057, and my laptop running W7 build 7100. Both were working perfectly. My dad was using the laptop, trying to configure and old printer connected to another PC with windows XP, in the middle of that, he said he "left the Homegroup" and then the permissions of all accounts were screwed up. Now, i can't browse files through my hard drive, every configuration options are blocked because "the system administrator blocked them". Is there any fix for this problem? or do i have to reinstall the system? Thanks.