router crashes all the fucking time

I have a thomson speedtouch st780, and it worked just fine before, but recently(few weeks ago) it started to crash every 3 hours or so, sometimes more, sometimes less frequently. I've tried turning the wireless off so it's no one from outside attacking it. What the fuck do I do besides getting a new router? It has the latest firmware. HALP

you could always not get a new router, but then you get the crashes

Warranty.