Quote from jficquette:
Those routes use flash memory and they only have so many rewrites.
If firmware update doesn't work then probably time to get new router.
FWIW, I had a lynksys that worked great then started to hang up my connection on a regular basis. I did the firmware update and it worked great. It finally wore out which according to a friend who is an "expert"(g) was due to the flash memory wearing out.
Quote from Hook N. Sinker:
Maybe the connections are dirty. You might try unplugging and plugging in everything a few times, see if the problem disappears. Unplug and plug the main power cord too, sometimes that gets intermittent.
Holy crap - some of the advice here is hilarious.
OP: When the internet appears to freeze, are you able to log into the router? If so you could check the status and logs and see what's going on.