Try using the diagnostics for the 1390 mini-card software, you probably need to rule out any environmental problems before you do that though. which adapter is providing the ad hoc network. How far are they away from each other? I don't know what you level of wireless experience is but cordless house phones, microwaves, chicken wire, pine trees, and where the USB adapter is. Could be environmental things that cause wireless to drop. In my experience, network adapters are pretty solid except for those couple of bad apples. There is a Template called windsurfer that I have used to extend range on my rougher and and Belkin usb n dongle. If a range or signal problem is the case. You can find them in Google just type windsurfer template. If you need a tool for identifying things that are interfering with your network metageek has ssider, and and channelizer lite for windows. Ssider is particularly great because it allows you to see networks in your area, and the channel that they are broadcasting on. Then you can adjust your network accordingly, like if they are on channel 1 and you are on channel 1, you get better communication if you are on 6. Lets start with those.and then we can start looking at, drivers,wireless settings, and general hardware stuff. One last question though, have you talked to tech support? and if so what was there answer?