We have a fairly serious problem, but are hoping (!) we might be ok. The situation is: we foolishly left a backup of highly sensitive data in a shared folder on a wireless network in our business park. The data has been sitting in this folder for two months. It's no secret that one of our competitors in the same park is very interested in this information and they've been on the network for several months now.
The settings on the relevant Windows Vista workstation: Network Discovery was 'off', and the Location Type was set to 'Public'. But the shared folder had read access for 'Everyone'.
Today, when we added a new laptop to this network, we saw the shared folder and could access this data. However, it's worth noting this laptop had accessed the Vista workstation many times when both machines were on another network and had mapped drives etc. from that period, so we're hoping the laptop could do this because it had prior knowledge of the Vista workstation.
Assuming the competitor is tech-savvy and motivated to obtain the information and has a history of this kind of behaviour - but: does not know the PC name for the Vista machine, and is fairly unlikely to know the IP address, how exposed have we been these past two months? The wireless network is private and WPA-enabled. Tell me all is ok! :D