I have now resolved the cause of the lack of NAT Internet connection on a Virtual Box MS Win 7 guest. After I installed SL 7.2 on my wife's new laptop, I restored (via a cp from an external USB hard drive that held all of the files that were not SL installed, including all of the Virtual Box guest files) the Virtual Box guest files from her previous laptop to the new machine. I installed the Virtual Box EL7 RPM, configured VirtualBox to recognize the restored guest files, and the NAT network functioned over the 802.11 WNIC controlled by SL 7 Network Manager -- everything worked (indeed, any statements that NAT would not work with 802.11 in "new" kernels were indeed red herrings). When I then restored her guest machine (MS Win 7 Pro as well) to my SL 7 laptop, again, NAT worked. Thus, I have determined that (somehow) the MS Win device NIC device driver that Virtual Box uses to connect to the NIC supplied by Virtual Box to the MS Win 7 guest was "broken". I have created a second virtual disk and have attached this to the MS Win 7 system that "works", and am in the process of doing a MS Win 7 backup (not a Linux backup) to this additional virtual disk that the MS Win 7 guest "sees" now as drive E: . I do not know MS Win very well at all, using it as an appliance, and real source code and OS architectural details are not readily available (several of my students who worked in MS Win "shops" have access to material licensed only to such "shops", not to persons such as myself, and even these have large limitations according to my students.) I know that I may remove said virtual disk from the working MS Win guest and attach it, via Virtual Box, to the non-working MS Win guest. I am not asking for a response to the SL list, but if anyone on this list knows how I can use this "backup" virtual hard drive to restore just the MS Win systems files (specifically, just this NIC driver and whatever associated MS Win 7 systems files it "needs"), I would greatly appreciate off-list (via my private email, [log in to unmask] if possible) as to what to do -- or a URL with the necessary instructions. Any help greatly would be appreciated. All of the guests in question are MS Win 7 Pro SP 1, and all have the necessary MS Win license. If at all possible, I do *NOT* want to "smash" the applications installed into the MS Win guest when I restore just the MS Win OS files. Yasha Karant