[mrmistoffelees]

here's a mad idea (might only work if your router supports the following)

Disconnect the router from the SACM.

Disable any forms of WEP/WPA etc running on the router.

Enable MAC filtering, and setup all devices that you want on your local network, with the MAC's to allow them to work.

Leave off the wireless encryption

Hide the SSID

Connect back to SACM

Reboot.

I've seen the issue a few times (Albeit normally on Belkin routers where for some reason the wireless encryption will cause the router to lock up) The above makes the locks up a lot lot less frequent.

The other thing you can try to do if you prefer, is disable uPnP if it is running on your router.