I received an iMac a couple of days ago - my first Mac by the way. Some days before that, I set up a wireless network at my appartment. On this network, which goes through an SMC access point, I use WPA encryption. I have two computers connected, my iMac and a laptop running Windows, and they are both setup to see eachother on the network. The problem is, that when I find a file on the laptop and want to move it to the iMac (say its a larger file > 500 mb), the transfer stops at some point. I think that this can be because the laptop seems to disconnect from the WLAN often and reconnect again - even though it seems that theese small disconnections do not always stop the transfers. The real problem is, that when a transfer stops, Finder crashes completely. I cannot even re-start it, so I have to turn down the computer using the power switch! Not even the "turn off" button in the Apple-menu works. Do you have any suggestions on what to do? The way I look at it, I have theese problems: a) transfers stop - why? Because of the laptop? It seems to connect to the network fine, so why does it disconnect? b) Mac OS X crashes - why? Howcome a disconnected WLAN-transfer can kill the Finder like that, so all I can do is to restart?