I'm trying to set up a file and sharing network between my PC's, 2 Win 7's and 1 Vista, and I'm having a bit of trouble. I followed all the steps in the tutorials across the web including this link, How To Share Files and Printers Between Windows 7 and Vista - How-To Geek, and the closest I could get is the Vista accessing one of the 7's. All the PC's see each other, it's just when I try to access files over the network with the 7's I get a "You don't have permission to access...contact your network administrator" error. I'm the admin on both computers and I really can't get by this. It's so frustrating, I have been doing this for like 3 days already. Just a bit of info, I do have BitDefender 2011 on both the 7's and not the Vista. Although it might not make sense, I thought this might be the issue of why the Vista can access one of the 7's, I disabled the service through msconfig -> services and startup. Also disabled the firewall on all. It still didn't fix the problem. I've never set up a network administrator, so I wouldn't know how to go about fixing this problem. Any help would greatly be appreciated. Thanks. Update: I actually figured it out. Although I enabled sharing with "everyone" and set permissions to full control, "everyone" was not showing up under group and users in the security tab. I just added that and voila. Something so simple made me almost pull out my hair.