Just installed my SP2013 Foundation Preview and i receive a 401 Error if im trying to access the server with a domain account. I added it to the Server Roles as Owner, Member and Site Collection Administrator but unfortunately the error is still popping up. I checked with the IIS-Logs
2012-08-01 11:33:52 10.254.7.219 GET / - 80 0#.w|akw\awe0317 10.254.1.12 Mozilla/5.0+(compatible;+MSIE+9.0;+Windows+NT+6.1;+WOW64;+Trident/5.0) 200 0 0 124
2012-08-01 11:33:52 10.254.7.219 GET /_layouts/15/start.aspx - 80 - 10.254.1.12 Mozilla/5.0+(compatible;+MSIE+9.0;+Windows+NT+6.1;+WOW64;+Trident/5.0) 401 0 0 109
these are the results.. my user is the awe0317 and i can't access the /_layouts/15/start.aspx file. i checked the permissions on the /_layouts folder and the users-group from my local sp machine have reading-rights.