The old router is probably having issues since this is Win8 now. It was released when XP was the main OS. Even if installed correctly it still falls on older network values which may not be WPA2 ready or such or how the network itself treats it. On top of that it's USB connected which itself is slightly slower overall to to react. if the latest driver doesn't help, it maybe flat out better to get a new adapter that fully states its Win8 ready. I had a MN-510 but moved away from it myself, though it worked, it seemed to hic-up now and then. Even the person I gave it to, had problems only after his connecting everything. It does work, but it failed to with wifi phones and/or other than PC setups. The more complicated the less likely it worked well.
I have a Mac and a PC (now running windows
My mac stays connected to the WiFi very nicely, but my PC likes to disconnect every 5 or so minutes. I'm using a Microsoft USB adapter model MN-510.
Here are some odd things I'm seeing:
I'm connected to my university network, but my WiFi is set to "Off" However, when I go to my network settings, it seems to be running.