Back to the original thought... Plug your computer into one of the LAN plugs of your router with a cat5 cable. Then, start diagnosing your router from there. Unplug everything (the power source, not the ethernet cables), let sit for 5 minutes, then plug in modem, let fully boot up (appx 45 seconds- 1 minute), then plug in router (allow 45 seconds-1 minute to reboot), then plug in the wireless device attached to the dvr, then reboot your computer. Diagnose all wireless problems from the web management page of your router, reset to factory defaults, update firmware, etc. DO NOT UNPLUG YOUR COMPUTER TILL YOU'VE FIXED THE PROBLEM. There's a chance that you'll destroy your router's firmware if you do any updating wirelessly.