Question Wifi tethering via OpenGarden app randomly disconnects after 2-3 mins?!

Hi.

I wirelessly tether between my phone and desktop everyday via the OpenGarden app and lately the connection drops randomly after being successfully connected for 2-3 minutes. Sometimes this is solved from rebooting both my phone AND pc but tonight I had to reinstall OpenGarden AND my wireless usb dongle for my pc and now so far it seems to be fine...but seriously, anyone else having issues similar to this? How do I solve?

Also, anyone know of a RELIABLE wired tethering app I can use that will give me LTE speeds?
Rooted Samsung Galaxy SIII on VZW