I am hoping someone with more skill than myself can answer this question. I have gone through about 4 different PCI network cards, all with the same issue. I have deduced that Windows 7 has to be the issue. I just cannot determine WHAT the issue is. I have totally random spasms of network problems, usually involved with me disconnecting from my network, and being unable to get back on. Currently, I have a DLINK DWA-566 PCIx1 Wireless N networking card, linked to a LinkSys WRT300N wireless home router, on a 2.4GHZ frequency (would go 5GHZ, but not all devices in my house support it). Every now and again, I will get random disconnections from the network, when everyone else works fine. I have been packet sniffing, and notice 0 odd packets. Just a complete and total stop. My computer will disconnect from the network, and no amount of fiddling can get it back on. Even a total reboot fails in most cases. I will usually have to sit and mess around with the network card, disabling, uninstalling from DM, rehooking drivers, etc. I do not see anything unusual in the Event Manager either. This has been common with every single network card I have ever used. I dunno if its my mother board, or windows causing the root problem. I use a base version of Windows 7 Professional x64 with absolutely 0 windows updates. I have Comodo Firewall, and no anti virus (I prefer to fight viruses manually anyways). I have the latest drivers by DLINK for my card, and even tech support from them was totally useless. Has anyone else experienced this issue, and found a fix? Either by a windows update, or some other strange method? It should be noted, I have regsvr32'd my entire driver set over and over, to no avail. SFC /SCANNNOW brought back nothing either...though I was just doing that out of frustration more than anything. I have double checked the WMI repository as well, and nothing seems wrong there. I am a technician myself, but this has me stumped. I leave it to the greater minds out there.